pkg/util/dbutil: remove dependency stmtctx from dbutil

[YangKeao]

What problem does this PR solve?

Issue Number: close #48911

Problem Summary:

What changed and how does it work?

Remove a simple usage of stmtctx in the dbutil.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.
    These codes are covered by existing tests.

Release note

None

[codecov]

Codecov Report

Merging #48913 (c4ddf61) into master (2e277dc) will decrease coverage by 17.4578%.
Report is 2 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #48913         +/-   ##
=================================================
- Coverage   70.9913%   53.5335%   -17.4578%     
=================================================
  Files          1368       1585        +217     
  Lines        404965     596925     +191960     
=================================================
+ Hits         287490     319555      +32065     
- Misses        97471     254916     +157445     
- Partials      20004      22454       +2450     

Flag	Coverage Δ
integration	35.1221% <ø> (?)
unit	71.0402% <100.0000%> (+0.0489%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9663% <ø> (ø)
parser	∅ <ø> (∅)
br	55.4648% <ø> (+2.3935%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, lcwangchao

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [hawkingrei,lcwangchao]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-27 06:16:33.296047654 +0000 UTC m=+817021.961273849: ☑️ agreed by hawkingrei.
• 2023-11-27 06:42:52.99664573 +0000 UTC m=+818601.661871925: ☑️ agreed by lcwangchao.