Fix vtclient vtgate missing flags (specifically --grpc_*) (#17800) #676

Job	Run time
Build and push lite (latest)	4m 45s
Build and push lite (mysql84)	4m 53s
Build and push lite (percona80)	4m 42s
Build and push vttestserver (mysql80)	3m 1s
Build and push vttestserver (mysql84)	2m 53s
Build and push (bullseye, vtadmin)	1m 45s
Build and push (bullseye, vtorc)	57s
Build and push (bullseye, vtgate)	53s
Build and push (bullseye, vttablet)	56s
Build and push (bullseye, mysqlctld)	1m 3s
Build and push (bullseye, mysqlctl)	1m 8s
Build and push (bullseye, vtctl)	58s
Build and push (bullseye, vtctlclient)	51s
Build and push (bullseye, vtctld)	1m 38s
Build and push (bullseye, vtctldclient)	47s
Build and push (bullseye, logrotate)	33s
Build and push (bullseye, logtail)	50s
Build and push (bullseye, vtbackup)	1m 2s
Build and push (bullseye, vtexplain)	58s
Build and push (bookworm, vtadmin)	1m 30s
Build and push (bookworm, vtorc)	1m 4s
Build and push (bookworm, vtgate)	53s
Build and push (bookworm, vttablet)	1m 10s
Build and push (bookworm, mysqlctld)	1m 12s
Build and push (bookworm, mysqlctl)	1m 1s
Build and push (bookworm, vtctl)	1m 11s
Build and push (bookworm, vtctlclient)	51s
Build and push (bookworm, vtctld)	1m 41s
Build and push (bookworm, vtctldclient)	1m 6s
Build and push (bookworm, logrotate)	33s
Build and push (bookworm, logtail)	35s
Build and push (bookworm, vtbackup)	1m 13s
Build and push (bookworm, vtexplain)	1m 16s
Slack Notification if failed	0s
	49m 49s

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