VStream API: validate that last PK has fields defined #328

Job	Run time
Set push variable	1s
Build and push vttestserver (mysql80)	1m 59s
Build and push lite (latest)	2m 10s
Build and push lite (percona80)	2m 17s
Build and push (bullseye, vtadmin)	1m 3s
Build and push (bullseye, vtorc)	38s
Build and push (bullseye, vtgate)	44s
Build and push (bullseye, vttablet)	36s
Build and push (bullseye, mysqlctld)	29s
Build and push (bullseye, mysqlctl)	43s
Build and push (bullseye, vtctl)	36s
Build and push (bullseye, vtctlclient)	37s
Build and push (bullseye, vtctld)	1m 11s
Build and push (bullseye, vtctldclient)	43s
Build and push (bullseye, logrotate)	30s
Build and push (bullseye, logtail)	27s
Build and push (bullseye, vtbackup)	1m 0s
Build and push (bullseye, vtexplain)	23s
Build and push (bookworm, vtadmin)	1m 6s
Build and push (bookworm, vtorc)	37s
Build and push (bookworm, vtgate)	43s
Build and push (bookworm, vttablet)	44s
Build and push (bookworm, mysqlctld)	43s
Build and push (bookworm, mysqlctl)	31s
Build and push (bookworm, vtctl)	26s
Build and push (bookworm, vtctlclient)	26s
Build and push (bookworm, vtctld)	59s
Build and push (bookworm, vtctldclient)	30s
Build and push (bookworm, logrotate)	17s
Build and push (bookworm, logtail)	28s
Build and push (bookworm, vtbackup)	32s
Build and push (bookworm, vtexplain)	42s
	24m 51s

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