branch-3.0: [fix](regression test) fix case variant_github_events_nonConcurrent_p2 #50437 (#50490)

Cherry-picked from #50437

Co-authored-by: Sun Chenyang <sunchenyang@selectdb.com>

Author: github-actions[bot]

regression-test/suites/variant_github_events_nonConcurrent_p2/load.groovy

@@ -178,11 +178,12 @@ suite("regression_test_variant_github_events_p2", "nonConcurrent,p2"){
     load_json_data.call(table_name, """${getS3Url() + '/regression/gharchive.m/2022-11-07-22.json'}""")
     load_json_data.call(table_name, """${getS3Url() + '/regression/gharchive.m/2022-11-07-23.json'}""")
 
-    if (!isCloudMode()) {
-        // BUILD INDEX and expect state is FINISHED
+    // BUILD INDEX
+    try {
         sql """ BUILD INDEX idx_var ON  github_events"""
-        def state = wait_for_last_build_index_on_table_finish("github_events", timeout)
-        assertEquals("FINISHED", state)
+    } catch (Exception e) {
+        log.info(e.getMessage())
+        assertTrue(e.getMessage().contains("The idx_var index can not be built on the v column, because it is a variant type column"))
     }
 
     // // add bloom filter at the end of loading data