Revert "Bump setuptools from 67.6.0 to 70.0.0" (#17455)

Reverts element-hq/synapse#17448

We hit a bug when deploying with synctl:

```
Traceback (most recent call last):
  File "/home/synapse/env-python311/bin/synctl", line 33, in <module>
    sys.exit(load_entry_point('matrix-synapse', 'console_scripts', 'synctl')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/bin/synctl", line 25, in importlib_load_entry_point
    return next(matches).load()
           ^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/importlib/metadata/__init__.py", line 202, in load
    module = import_module(match.group('module'))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/synapse/src/synapse/_scripts/synctl.py", line 37, in <module>
    from synapse.config import find_config_files
  File "/home/synapse/src/synapse/config/__init__.py", line 22, in <module>
    from ._base import ConfigError, find_config_files
  File "/home/synapse/src/synapse/config/_base.py", line 49, in <module>
    import pkg_resources
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 3282, in <module>
    @_call_aside
     ^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 3266, in _call_aside
    f(*args, **kwargs)
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 3295, in _initialize_master_working_set
    working_set = _declare_state('object', 'working_set', WorkingSet._build_master())
                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 589, in _build_master
    ws.require(__requires__)
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 926, in require
    needed = self.resolve(parse_requirements(requirements))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 787, in resolve
    dist = self._resolve_dist(
           ^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 816, in _resolve_dist
    env = Environment(self.entries)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 1014, in __init__
    self.scan(search_path)
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 1046, in scan
    for dist in find_distributions(item):
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 2091, in find_on_path
    yield from factory(fullpath)
               ^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 2183, in resolve_egg_link
    return next(dist_groups, ())
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 2179, in <genexpr>
    resolved_paths = (
                     ^
  File "/home/synapse/env-python311/lib/python3.11/site-packages/pkg_resources/__init__.py", line 2167, in non_empty_lines
    for line in _read_utf8_with_fallback(path).splitlines():
                ^^^^^^^^^^^^^^^^^^^^^^^^
NameError: name '_read_utf8_with_fallback' is not defined
```

1 files changed, 7 insertions, 6 deletions

diff --git a/poetry.lock b/poetry.lock
index 4092a41884..b3e45972f1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2504,18 +2504,19 @@ tests = ["coverage[toml] (>=5.0.2)", "pytest"]
 
 [[package]]
 name = "setuptools"
-version = "70.0.0"
+version = "67.6.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.7"
 files = [
-    {file = "setuptools-70.0.0-py3-none-any.whl", hash = "sha256:54faa7f2e8d2d11bcd2c07bed282eef1046b5c080d1c32add737d7b5817b1ad4"},
-    {file = "setuptools-70.0.0.tar.gz", hash = "sha256:f211a66637b8fa059bb28183da127d4e86396c991a942b028c6650d4319c3fd0"},
+    {file = "setuptools-67.6.0-py3-none-any.whl", hash = "sha256:b78aaa36f6b90a074c1fa651168723acbf45d14cb1196b6f02c0fd07f17623b2"},
+    {file = "setuptools-67.6.0.tar.gz", hash = "sha256:2ee892cd5f29f3373097f5a814697e397cf3ce313616df0af11231e2ad118077"},
 ]
 
 [package.extras]
-docs = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "pygments-github-lexers (==0.0.5)", "pyproject-hooks (!=1.1)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-favicon", "sphinx-inline-tabs", "sphinx-lint", "sphinx-notfound-page (>=1,<2)", "sphinx-reredirects", "sphinxcontrib-towncrier"]
-testing = ["build[virtualenv] (>=1.0.3)", "filelock (>=3.4.0)", "importlib-metadata", "ini2toml[lite] (>=0.14)", "jaraco.develop (>=7.21)", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "mypy (==1.9)", "packaging (>=23.2)", "pip (>=19.1)", "pyproject-hooks (!=1.1)", "pytest (>=6,!=8.1.1)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-home (>=0.5)", "pytest-mypy", "pytest-perf", "pytest-ruff (>=0.2.1)", "pytest-subprocess", "pytest-timeout", "pytest-xdist (>=3)", "tomli", "tomli-w (>=1.0.0)", "virtualenv (>=13.0.0)", "wheel"]
+docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "pygments-github-lexers (==0.0.5)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-favicon", "sphinx-hoverxref (<2)", "sphinx-inline-tabs", "sphinx-lint", "sphinx-notfound-page (==0.8.3)", "sphinx-reredirects", "sphinxcontrib-towncrier"]
+testing = ["build[virtualenv]", "filelock (>=3.4.0)", "flake8 (<5)", "flake8-2020", "ini2toml[lite] (>=0.9)", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "pip (>=19.1)", "pip-run (>=8.8)", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)", "pytest-perf", "pytest-timeout", "pytest-xdist", "tomli-w (>=1.0.0)", "virtualenv (>=13.0.0)", "wheel"]
+testing-integration = ["build[virtualenv]", "filelock (>=3.4.0)", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "pytest", "pytest-enabler", "pytest-xdist", "tomli", "virtualenv (>=13.0.0)", "wheel"]
 
 [[package]]
 name = "setuptools-rust"