test: Include unit tests for `switcher-dry-run` (#17403) #510

Job	Run time
Build and push lite (latest)	4m 48s
Build and push lite (percona80)	4m 39s
Build and push vttestserver (mysql80)	2m 41s
Build and push (bullseye, vtadmin)	1m 27s
Build and push (bullseye, vtorc)	35s
Build and push (bullseye, vtgate)	51s
Build and push (bullseye, vttablet)	51s
Build and push (bullseye, mysqlctld)	42s
Build and push (bullseye, mysqlctl)	46s
Build and push (bullseye, vtctl)	53s
Build and push (bullseye, vtctlclient)	50s
Build and push (bullseye, vtctld)	1m 32s
Build and push (bullseye, vtctldclient)	52s
Build and push (bullseye, logrotate)	24s
Build and push (bullseye, logtail)	28s
Build and push (bullseye, vtbackup)	47s
Build and push (bullseye, vtexplain)	46s
Build and push (bookworm, vtadmin)	1m 27s
Build and push (bookworm, vtorc)	55s
Build and push (bookworm, vtgate)	50s
Build and push (bookworm, vttablet)	47s
Build and push (bookworm, mysqlctld)	48s
Build and push (bookworm, mysqlctl)	47s
Build and push (bookworm, vtctl)	57s
Build and push (bookworm, vtctlclient)	43s
Build and push (bookworm, vtctld)	1m 36s
Build and push (bookworm, vtctldclient)	58s
Build and push (bookworm, logrotate)	26s
Build and push (bookworm, logtail)	34s
Build and push (bookworm, vtbackup)	50s
Build and push (bookworm, vtexplain)	51s
Slack Notification if failed	0s
	36m 21s

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