importccl: fix flaky test TestImportCSVStmt

TestImportCSVStmt tests that IMPORT jobs appear in a certain order
in the system.jobs table. Automatic statistics were causing this
test to be flaky since CreateStats jobs were present in the jobs
table as well, in an unpredictable order. This commit fixes the problem
by only selecting IMPORT jobs from the jobs table.

Fixes cockroachdb#34568

Release note: None

pkg/ccl/importccl/import_stmt_test.go

@@ -867,7 +867,6 @@ func TestImportCSVStmt(t *testing.T) {
 	if testing.Short() {
 		t.Skip("short")
 	}
-	t.Skip(`#34568`)
 
 	const (
 		nodes       = 3

pkg/testutils/jobutils/jobs_verification.go

@@ -145,7 +145,8 @@ func verifySystemJob(
 	// the job ID.
 	db.QueryRow(t, `
 		SELECT job_type, description, user_name, descriptor_ids, status, running_status
-		FROM crdb_internal.jobs ORDER BY created LIMIT 1 OFFSET $1`,
+		FROM crdb_internal.jobs WHERE job_type = $1 ORDER BY created LIMIT 1 OFFSET $2`,
+		expectedType.String(),
 		offset,
 	).Scan(
 		&actualType, &actual.Description, &actual.Username, &rawDescriptorIDs,