Reorganize Pydantic models and types used in handlers (#17279)

Spawning from https://github.com/element-hq/synapse/pull/17187#discussion_r1619492779 around wanting to put `SlidingSyncBody` (parse the request in the rest layer), `SlidingSyncConfig` (from the rest layer, pass to the handler), `SlidingSyncResponse` (pass the response from the handler back to the rest layer to respond) somewhere that doesn't contaminate the imports and cause circular import issues.

 - Moved Pydantic parsing models to `synapse/types/rest`
 - Moved handler types to `synapse/types/handlers`

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/rest/client/sync.py b/synapse/rest/client/sync.py

index 385b102b3d..1b0ac20d94 100644
--- a/synapse/rest/client/sync.py
+++ b/synapse/rest/client/sync.py
@@ -53,8 +53,8 @@ from synapse.http.servlet import (
 )
 from synapse.http.site import SynapseRequest
 from synapse.logging.opentracing import trace_with_opname
-from synapse.rest.client.models import SlidingSyncBody
 from synapse.types import JsonDict, Requester, StreamToken
+from synapse.types.rest.client import SlidingSyncBody
 from synapse.util import json_decoder
 from synapse.util.caches.lrucache import LruCache