Flaky test fix: TestMoveTablesSharded and TestMoveTablesUnsharded (#1… #497

Job	Run time
Build and push lite (latest)	4m 52s
Build and push vttestserver (mysql80)	2m 26s
Build and push lite (percona80)	5m 12s
Build and push (bullseye, vtadmin)	1m 24s
Build and push (bullseye, vtorc)	53s
Build and push (bullseye, vtgate)	48s
Build and push (bullseye, vttablet)	54s
Build and push (bullseye, mysqlctld)	50s
Build and push (bullseye, mysqlctl)	45s
Build and push (bullseye, vtctl)	52s
Build and push (bullseye, vtctlclient)	45s
Build and push (bullseye, vtctld)	1m 29s
Build and push (bullseye, vtctldclient)	40s
Build and push (bullseye, logrotate)	26s
Build and push (bullseye, logtail)	32s
Build and push (bullseye, vtbackup)	46s
Build and push (bullseye, vtexplain)	45s
Build and push (bookworm, vtadmin)	1m 33s
Build and push (bookworm, vtorc)	45s
Build and push (bookworm, vtgate)	40s
Build and push (bookworm, vttablet)	48s
Build and push (bookworm, mysqlctld)	57s
Build and push (bookworm, mysqlctl)	57s
Build and push (bookworm, vtctl)	59s
Build and push (bookworm, vtctlclient)	46s
Build and push (bookworm, vtctld)	1m 37s
Build and push (bookworm, vtctldclient)	45s
Build and push (bookworm, logrotate)	24s
Build and push (bookworm, logtail)	29s
Build and push (bookworm, vtbackup)	58s
Build and push (bookworm, vtexplain)	49s
Slack Notification if failed	0s
	36m 46s

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