[BACKPORT 2.20][#18934] CDCSDK: Fix failing TestReleaseResourcesOnUnp…

…olledSplitTablets test

Summary:
Original commit: 9c370a0 / D31702
In https://phorge.dev.yugabyte.com/D30918, we introduced support for rolling back a failed CDC stream.

As part of the rollback revision, we enabled the UpdatePeersAndMetrics thread earlier in the flow (SetCDCServiceEnabled()). The test
TestReleaseResourcesOnUnpolledSplitTablets started intermittently failing. The failure happens because the UpdatePeersAndMetrics thread was caching the stream metadata
without the stream creation time.

The fix is to make the UpdatePeersAndMetrics thread refresh the cached stream metadata if the state is in Initialized state.
Jira: DB-7785

Test Plan:
Jenkins: test regex: .*CDCSDK.*

./yb_build.sh --cxx-test cdcsdk_consistent_snapshot-test --gtest_filter CDCSDKConsistentSnapshotTest.TestReleaseResourcesOnUnpolledSplitTablets -n 5

Reviewers: asrinivasan, skumar

Reviewed By: asrinivasan

Subscribers: ycdcxcluster

Tags: #jenkins-ready

Differential Revision: https://phorge.dev.yugabyte.com/D31806

src/yb/cdc/cdc_service.cc

@@ -3415,7 +3415,8 @@ Status CDCServiceImpl::CheckTabletNotOfInterest(
     bool deletion_check) {
 
   // This is applicable only to Consistent Snapshot Streams,
-  auto record = VERIFY_RESULT(GetStream(producer_tablet.stream_id));
+  auto record = VERIFY_RESULT(
+      GetStream(producer_tablet.stream_id, RefreshStreamMapOption::kIfInitiatedState));
   if (!record->GetSnapshotOption().has_value() || !record->GetStreamCreationTime().has_value()) {
     return Status::OK();
   }