Allow build git envs to be set in `docker/lite` (#17827) #674

Job	Run time
Build and push lite (latest)	4m 47s
Build and push lite (mysql84)	4m 45s
Build and push lite (percona80)	4m 48s
Build and push vttestserver (mysql80)	2m 57s
Build and push vttestserver (mysql84)	3m 13s
Build and push (bullseye, vtadmin)	1m 46s
Build and push (bullseye, vtorc)	1m 58s
Build and push (bullseye, vtgate)	1m 56s
Build and push (bullseye, vttablet)	1m 8s
Build and push (bullseye, mysqlctld)	1m 14s
Build and push (bullseye, mysqlctl)	59s
Build and push (bullseye, vtctl)	1m 59s
Build and push (bullseye, vtctlclient)	1m 33s
Build and push (bullseye, vtctld)	1m 44s
Build and push (bullseye, vtctldclient)	1m 14s
Build and push (bullseye, logrotate)	32s
Build and push (bullseye, logtail)	39s
Build and push (bullseye, vtbackup)	1m 12s
Build and push (bullseye, vtexplain)	1m 18s
Build and push (bookworm, vtadmin)	1m 45s
Build and push (bookworm, vtorc)	2m 6s
Build and push (bookworm, vtgate)	1m 50s
Build and push (bookworm, vttablet)	1m 47s
Build and push (bookworm, mysqlctld)	1m 13s
Build and push (bookworm, mysqlctl)	1m 10s
Build and push (bookworm, vtctl)	1m 11s
Build and push (bookworm, vtctlclient)	2m 9s
Build and push (bookworm, vtctld)	3m 4s
Build and push (bookworm, vtctldclient)	1m 50s
Build and push (bookworm, logrotate)	30s
Build and push (bookworm, logtail)	48s
Build and push (bookworm, vtbackup)	1m 7s
Build and push (bookworm, vtexplain)	1m 47s
Slack Notification if failed	0s
	1h 1m 59s

Provide feedback