Limit rare race condition in `topo.Server` (#17165) #426

Job	Run time
Build and push lite (latest)	4m 33s
Build and push vttestserver (mysql80)	2m 38s
Build and push lite (percona80)	4m 36s
Build and push (bullseye, vtadmin)	1m 19s
Build and push (bullseye, vtorc)	50s
Build and push (bullseye, vtgate)	39s
Build and push (bullseye, vttablet)	47s
Build and push (bullseye, mysqlctld)	40s
Build and push (bullseye, mysqlctl)	45s
Build and push (bullseye, vtctl)	51s
Build and push (bullseye, vtctlclient)	53s
Build and push (bullseye, vtctld)	1m 29s
Build and push (bullseye, vtctldclient)	39s
Build and push (bullseye, logrotate)	26s
Build and push (bullseye, logtail)	23s
Build and push (bullseye, vtbackup)	51s
Build and push (bullseye, vtexplain)	47s
Build and push (bookworm, vtadmin)	1m 15s
Build and push (bookworm, vtorc)	40s
Build and push (bookworm, vtgate)	51s
Build and push (bookworm, vttablet)	57s
Build and push (bookworm, mysqlctld)	54s
Build and push (bookworm, mysqlctl)	47s
Build and push (bookworm, vtctl)	51s
Build and push (bookworm, vtctlclient)	45s
Build and push (bookworm, vtctld)	1m 42s
Build and push (bookworm, vtctldclient)	47s
Build and push (bookworm, logrotate)	32s
Build and push (bookworm, logtail)	34s
Build and push (bookworm, vtbackup)	41s
Build and push (bookworm, vtexplain)	56s
Slack Notification if failed	0s
	35m 18s

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