ci: stop re-checking the same Google Cloud log line in a loop

[teor2345]

Motivation

In some workflows, we re-check the same Google Cloud log line multiple times in a loop:

zebra/.github/workflows/test-full-sync.yml

Lines 238 to 242 in 6d2c4fb

	while [[ ${SYNC_HEIGHT} == "" ]]; do
	SYNC_HEIGHT=$(gcloud logging read --format='value(jsonPayload.MESSAGE)' --order="desc" --limit=1 '(resource.labels.instance_id="${{ env.INSTANCE_ID }}" AND jsonPayload.message=~".+finished initial sync to chain tip.+Height\([0-9]+\).+")' | grep -oE 'Height\([0-9]+\)' | grep -oE '[0-9]+' || [[ $? == 1 ]] )
	echo "SYNC_HEIGHT: $SYNC_HEIGHT"
	sleep 10
	done

This log line will never change, because the zebrad process has finished.

This could cause hangs, but it doesn't seem to be doing that right now, so it's a low priority.

Designs

In every workflow that checks logs after zebrad has exited:

• Just check the log lines once
• If that causes failures, go back further in the logs