Improve vtgate logging for buffering (#17654) #611

Job	Run time
Build and push lite (latest)	4m 48s
Build and push vttestserver (mysql80)	3m 4s
Build and push lite (mysql84)	4m 41s
Build and push vttestserver (mysql84)	2m 58s
Build and push lite (percona80)	4m 37s
Build and push (bullseye, vtadmin)	1m 34s
Build and push (bullseye, vtorc)	46s
Build and push (bullseye, vtgate)	54s
Build and push (bullseye, vttablet)	57s
Build and push (bullseye, mysqlctld)	47s
Build and push (bullseye, mysqlctl)	55s
Build and push (bullseye, vtctl)	56s
Build and push (bullseye, vtctlclient)	51s
Build and push (bullseye, vtctld)	1m 38s
Build and push (bullseye, vtctldclient)	58s
Build and push (bullseye, logrotate)	31s
Build and push (bullseye, logtail)	42s
Build and push (bullseye, vtbackup)	1m 6s
Build and push (bullseye, vtexplain)	1m 4s
Build and push (bookworm, vtadmin)	1m 37s
Build and push (bookworm, vtorc)	58s
Build and push (bookworm, vtgate)	1m 17s
Build and push (bookworm, vttablet)	1m 18s
Build and push (bookworm, mysqlctld)	54s
Build and push (bookworm, mysqlctl)	1m 24s
Build and push (bookworm, vtctl)	1m 4s
Build and push (bookworm, vtctlclient)	1m 6s
Build and push (bookworm, vtctld)	1m 40s
Build and push (bookworm, vtctldclient)	55s
Build and push (bookworm, logrotate)	35s
Build and push (bookworm, logtail)	40s
Build and push (bookworm, vtbackup)	1m 3s
Build and push (bookworm, vtexplain)	55s
Slack Notification if failed	0s
	49m 13s

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