Change keys of the discovery flags such that they conform to the conv… #533

Job	Run time
Build and push vttestserver (mysql80)	2m 47s
Build and push lite (latest)	4m 43s
Build and push lite (percona80)	4m 39s
Build and push (bullseye, vtadmin)	1m 18s
Build and push (bullseye, vtorc)	44s
Build and push (bullseye, vtgate)	42s
Build and push (bullseye, vttablet)	46s
Build and push (bullseye, mysqlctld)	44s
Build and push (bullseye, mysqlctl)	46s
Build and push (bullseye, vtctl)	44s
Build and push (bullseye, vtctlclient)	43s
Build and push (bullseye, vtctld)	1m 27s
Build and push (bullseye, vtctldclient)	45s
Build and push (bullseye, logrotate)	21s
Build and push (bullseye, logtail)	27s
Build and push (bullseye, vtbackup)	52s
Build and push (bullseye, vtexplain)	50s
Build and push (bookworm, vtadmin)	1m 16s
Build and push (bookworm, vtorc)	45s
Build and push (bookworm, vtgate)	53s
Build and push (bookworm, vttablet)	58s
Build and push (bookworm, mysqlctld)	44s
Build and push (bookworm, mysqlctl)	45s
Build and push (bookworm, vtctl)	57s
Build and push (bookworm, vtctlclient)	41s
Build and push (bookworm, vtctld)	1m 31s
Build and push (bookworm, vtctldclient)	47s
Build and push (bookworm, logrotate)	40s
Build and push (bookworm, logtail)	22s
Build and push (bookworm, vtbackup)	49s
Build and push (bookworm, vtexplain)	50s
Slack Notification if failed	0s
	35m 16s

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