Internal User Endpoint - vulnerability fix + response type fix (#8228)

* fix(key_management_endpoints.py): fix vulnerability where a user could update another user's keys

Resolves https://github.com/BerriAI/litellm/issues/8031

* test(key_management_endpoints.py): return consistent 403 forbidden error when modifying key that doesn't belong to user

* fix(internal_user_endpoints.py): return model max budget in internal user create response

Fixes https://github.com/BerriAI/litellm/issues/7047

* test: fix test

* test: update test to handle gemini token counter change

* fix(factory.py): fix bedrock http:// handling

* docs: fix typo in lm_studio.md (#8222)

* test: fix testing

* test: fix test

---------

Co-authored-by: foreign-sub <51928805+foreign-sub@users.noreply.github.com>

tests/proxy_admin_ui_tests/test_key_management.py

@@ -842,7 +842,15 @@ async def test_key_update_with_model_specific_params(prisma_client):
         "litellm_budget_table": None,
         "token": token_hash,
     }
-    await update_key_fn(request=request, data=UpdateKeyRequest(**args))
+    await update_key_fn(
+        request=request,
+        data=UpdateKeyRequest(**args),
+        user_api_key_dict=UserAPIKeyAuth(
+            user_role=LitellmUserRoles.PROXY_ADMIN,
+            api_key="sk-1234",
+            user_id="1234",
+        ),
+    )
 
 
 @pytest.mark.asyncio