[MM-67173] to-fix: skip flaky playIncomingCallsRinging test in calls state (#9415)

* fix: skip flaky playIncomingCallsRinging test in calls state

Skip the playIncomingCallsRinging test that has been causing
intermittent failures. Added TODO comment to track that the
root cause still needs to be identified.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* add link to ticket that should fix the test

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: Willyfrog

app/products/calls/state/actions.test.ts

@@ -1453,7 +1453,9 @@ describe('useCallsState', () => {
         assert.deepEqual(result.current[2], expectedIncomingCalls);
     });
 
-    it('playIncomingCallsRinging', async () => {
+    // TODO: Flaky test - disabled until root cause is identified
+    // See https://mattermost.atlassian.net/browse/MM-67173
+    it.skip('playIncomingCallsRinging', async () => {
         const initialIncomingCalls = {
             ...DefaultIncomingCalls,
             incomingCalls: [{