TAC: Release Announcement (#12380)

* WIP

* Store the release announcements in the account settings

* Update TAC release announcement description

* Fix settings content comparison

* Add logging in case of failure

* Watch settings changes

* I add release announcement settings to disable it

* Disable release announcement in e2e test

* Add release announcement in e2e test

* Add tests for ReleaseAnnouncementStore.ts

* Update compound-web to `3.3.0`

* Update TAC tests

* Update Labs tests

* Nits

* Add test for ReleaseAnnouncement.tsx

* Update `@vector-im/compound-web`

* Add playwright snapshot

* Delete false playwright screenshot

* Wait for EW to be displayed after reload

* Add screenshot

* Clean util file

* Renaming and comments fixing

* Use second store instead of looking in the store.

---------

Co-authored-by: R Midhun Suresh <hi@midhun.dev>

test/components/views/settings/tabs/user/LabsUserSettingsTab-test.tsx

@@ -60,7 +60,7 @@ describe("<LabsUserSettingsTab />", () => {
         // non-beta labs section
         expect(screen.getByText("Early previews")).toBeInTheDocument();
         const labsSections = container.getElementsByClassName("mx_SettingsSubsection");
-        expect(labsSections).toHaveLength(10);
+        expect(labsSections).toHaveLength(11);
     });
 
     describe("Rust crypto setting", () => {