[Remote cluster state] Emit metrics for timeout for metadata transfer to remote store

[dhwanilpatel]

Is your feature request related to a problem? Please describe.
In remote cluster state, we transfer files to remote store for IndexMetadata/GlobalMetadata. We should emit metrics around timeouts in those transfer. Cover for both IndexMetadata and GlobalMetadata.

OpenSearch/server/src/main/java/org/opensearch/gateway/remote/RemoteClusterStateService.java

Lines 312 to 322 in 9cc0e7d

	if (latch.await(INDEX_METADATA_UPLOAD_WAIT_MILLIS, TimeUnit.MILLISECONDS) == false) {
	IndexMetadataTransferException ex = new IndexMetadataTransferException(
	String.format(
	Locale.ROOT,
	"Timed out waiting for transfer of index metadata to complete - %s",
	toUpload.stream().map(IndexMetadata::getIndex).map(Index::toString).collect(Collectors.joining(""))
	)
	);
	exceptionList.forEach(ex::addSuppressed);
	throw ex;
	}

Meta issue: #10523

[rwali-aws]

[Triage - attendees 1 2 3 4 5 6]

@dhwanilpatel This issue is tagged to #10523, which is already closed. Do you know if this issue can be closed as well?