dm: handle the query in metadata from binlog

[joccau]

What problem does this PR solve?

Issue Number: close #11735

What is changed and how it works?

Handle the new format of binlog metadata from mariadb to read the binlog position.

Check List

Tests

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

Questions

Will it cause performance regression or break compatibility?

Not.

Do you need to update user documentation, design documentation or monitoring documentation?

Not.

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign gmhdbjd for approval. For more information see the Code Review Process.

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

Needs approval from an approver in each of these files:

• dm/OWNERS

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

[sre-bot]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.1605%. Comparing base (b2a4f9a) to head (1020abf).

Additional details and impacted files

Components	Coverage Δ
cdc	59.5962% <ø> (+0.0206%)	⬆️
dm	50.0327% <100.0000%> (-0.0039%)	⬇️
engine	53.2449% <ø> (+0.0056%)	⬆️

Flag	Coverage Δ
unit	55.1605% <100.0000%> (+0.0094%)	⬆️

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

@@               Coverage Diff                @@
##             master     #11743        +/-   ##
================================================
+ Coverage   55.1510%   55.1605%   +0.0094%     
================================================
  Files          1002       1002                
  Lines        137399     137399                
================================================
+ Hits          75777      75790        +13     
+ Misses        56074      56063        -11     
+ Partials       5548       5546         -2