refactor(backend): move the router files for postmark to not the v2 folder (#9597)

<!-- Clearly explain the need for these changes: -->
One of the pull request review notes from when these were first made is
that they don't belong in the v2 folder. This pr fixes where they are.

### Changes 🏗️
- Moves from v2 to routers for the postmark tooling
<!-- Concisely describe all of the changes made in this pull request:
-->

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  <!-- Put your test plan here: -->
  - [x] Check that linting and tests pass

---------

Co-authored-by: Zamil Majdy <zamil.majdy@agpt.co>

autogpt_platform/backend/backend/server/rest_api.py

@@ -17,13 +17,13 @@ import backend.data.db
 import backend.data.graph
 import backend.data.user
 import backend.server.integrations.router
+import backend.server.routers.postmark.postmark
 import backend.server.routers.v1
 import backend.server.v2.admin.store_admin_routes
 import backend.server.v2.library.db
 import backend.server.v2.library.model
 import backend.server.v2.library.routes
 import backend.server.v2.otto.routes
-import backend.server.v2.postmark.postmark
 import backend.server.v2.store.model
 import backend.server.v2.store.routes
 import backend.util.service
@@ -115,8 +115,8 @@ app.include_router(
 )
 
 app.include_router(
-    backend.server.v2.postmark.postmark.router,
-    tags=["v2", "email"],
+    backend.server.routers.postmark.postmark.router,
+    tags=["v1", "email"],
     prefix="/api/email",
 )
 

autogpt_platform/backend/backend/server/routers/postmark/postmark.py

@@ -10,7 +10,7 @@ from backend.data.user import (
     set_user_email_verification,
     unsubscribe_user_by_token,
 )
-from backend.server.v2.postmark.models import (
+from backend.server.routers.postmark.models import (
     PostmarkBounceEnum,
     PostmarkBounceWebhook,
     PostmarkClickWebhook,