Forget to use physical ID in checkBackfillJobCount

[zimulala]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

tidb/ddl/dist_owner.go

Lines 459 to 473 in 21aa40f

	func checkBackfillJobCount(sess *session, ddlJobID, currEleID int64, currEleKey []byte, pTblID int64) (backfillJobCnt int, err error) {
	err = checkAndHandleInterruptedBackfillJobs(sess, ddlJobID, currEleID, currEleKey)
	if err != nil {
	return 0, errors.Trace(err)
	}
	backfillJobCnt, err = GetBackfillJobCount(sess, BackgroundSubtaskTable,
	fmt.Sprintf("task_key like \"%d_%s_%d_%%\"",
	ddlJobID, hex.EncodeToString(currEleKey), currEleID), "check_backfill_job_count")
	if err != nil {
	return 0, errors.Trace(err)
	}
	return backfillJobCnt, nil
	}

Forget to use pTblID.
Related PR: #41093.

2. What did you expect to see? (Required)

3. What did you see instead (Required)

https://github.com/pingcap/tidb/pull/41093/files#diff-b493c3e8047646e9d597e05480ab2f44467ca8b035b7ac9f44c8ac1af55f15e4L449

4. What is your TiDB version? (Required)

https://github.com/pingcap/tidb/pull/41093/files#diff-b493c3e8047646e9d597e05480ab2f44467ca8b035b7ac9f44c8ac1af55f15e4R449

master
v6.6.0