inspect/delete `TestTenantClusterFlow`

[iliana]

cockroach/pkg/sql/flowinfra/cluster_test.go

Lines 326 to 328 in afda0c1

	func TestTenantClusterFlow(t *testing.T) {
	defer leaktest.AfterTest(t)()
	skip.IgnoreLint(t, "tenant connector requires a CCL binary")

There's a similarish TestClusterFlow above, figure out if the two tests are more or less equivalent, and delete the multitenant one we deleted the underlying CCL-licensed code for.