roachtest: sqlsmith/setup=seed-vec/setting=vec failed

[cockroach-teamcity]

roachtest.sqlsmith/setup=seed-vec/setting=vec failed with artifacts on release-21.2 @ 4811bb9c8c1d20b9f200d44bc7df388ad2d80898:

The test failed on branch=release-21.2, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/sqlsmith/setup=seed-vec/setting=vec/run_1
	sqlsmith.go:229,sqlsmith.go:258,test_runner.go:777: error: pq: inbox communication error: rpc error: code = Canceled desc = context canceled
		stmt:
		SELECT
			tab_37036._int2 AS col_134749, tab_37036._uuid AS col_134750
		FROM
			defaultdb.public.seed_vec AS tab_37033
			JOIN defaultdb.public.seed_vec AS tab_37034 ON
					(tab_37033._int8) = (tab_37034._int8)
					AND (tab_37033._date) = (tab_37034._date)
					AND (tab_37033._float8) = (tab_37034._float8),
			defaultdb.public.seed_vec@[0] AS tab_37035
			JOIN defaultdb.public.seed_vec@[0] AS tab_37036 ON (tab_37035._int8) = (tab_37036._int2)
		ORDER BY
			tab_37033._float8 DESC
		LIMIT
			9:::INT8;

Reproduce

See: roachtest README

/cc @cockroachdb/sql-queries

This test on roachdash | Improve this report!

[rytaft]

Inbox communication error when vectorized panic injection is enabled, tracked in #66174