Fix unreachable errors when taking a backup (#17062) #393

Job	Run time
Build and push lite (latest)	4m 14s
Build and push vttestserver (mysql80)	2m 50s
Build and push lite (percona80)	4m 26s
Build and push (bullseye, vtadmin)	1m 19s
Build and push (bullseye, vtorc)	52s
Build and push (bullseye, vtgate)	46s
Build and push (bullseye, vttablet)	52s
Build and push (bullseye, mysqlctld)	53s
Build and push (bullseye, mysqlctl)	46s
Build and push (bullseye, vtctl)	55s
Build and push (bullseye, vtctlclient)	49s
Build and push (bullseye, vtctld)	1m 47s
Build and push (bullseye, vtctldclient)	43s
Build and push (bullseye, logrotate)	20s
Build and push (bullseye, logtail)	30s
Build and push (bullseye, vtbackup)	48s
Build and push (bullseye, vtexplain)	42s
Build and push (bookworm, vtadmin)	1m 27s
Build and push (bookworm, vtorc)	44s
Build and push (bookworm, vtgate)	54s
Build and push (bookworm, vttablet)	1m 0s
Build and push (bookworm, mysqlctld)	53s
Build and push (bookworm, mysqlctl)	59s
Build and push (bookworm, vtctl)	47s
Build and push (bookworm, vtctlclient)	52s
Build and push (bookworm, vtctld)	1m 38s
Build and push (bookworm, vtctldclient)	43s
Build and push (bookworm, logrotate)	26s
Build and push (bookworm, logtail)	30s
Build and push (bookworm, vtbackup)	46s
Build and push (bookworm, vtexplain)	40s
Slack Notification if failed	0s
	35m 51s

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