client: use Tracer from Span and fix unfinished span

[CabinfeverB]

What problem does this PR solve?

Issue Number: close #7861

What is changed and how does it work?

1. using Tracer from Span not global tracer
2. finish Span for GetLocalTSAsync

Check List

Tests

• Unit test
• manual test
  

Code changes

• Has the configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JmPotato
• rleungx

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[codecov]

Codecov Report

Merging #7860 (7b2f4b4) into master (2851db2) will increase coverage by 0.05%.
Report is 2 commits behind head on master.
The diff coverage is 22.22%.

❗ Current head 7b2f4b4 differs from pull request most recent head 7ec9bd1. Consider uploading reports for the commit 7ec9bd1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7860      +/-   ##
==========================================
+ Coverage   73.44%   73.50%   +0.05%     
==========================================
  Files         433      433              
  Lines       47972    47966       -6     
==========================================
+ Hits        35235    35257      +22     
+ Misses       9691     9664      -27     
+ Partials     3046     3045       -1     

Flag	Coverage Δ
unittests	73.50% <22.22%> (+0.05%)	⬆️

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

[rleungx]

There are two GetLocalTSAsync, is it expected?

[CabinfeverB]

Yes, because we use the same recorder twice.

[JmPotato]

@CabinfeverB Please resolve the conflicts.

[CabinfeverB]

/merge

[ti-chi-bot]

@CabinfeverB: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

If you have any questions about the PR merge process, please refer to pr process.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 7b2f4b4

[ti-chi-bot]

@CabinfeverB: Your PR was out of date, I have automatically updated it for you.

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.