metrics: let tso processing time not include consumption on the network (#3523)

[ti-srebot]

cherry-pick #3523 to release-5.0
You can switch your code base to this Pull Request by using git-extras:

# In pd repo:
git pr https://github.com/tikv/pd/pull/3525

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/pd.git pr/3525:release-5.0-c4f22fd42119

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Signed-off-by: nolouch nolouch@gmail.com

What problem does this PR solve?

Sometimes we see the handle tso duration is high in the PD side, which usually caused by the network.

What is changed and how it works?

Check List

Tests

• Unit test

Release note

• metrics: let tso processing time not include consumption on the network

[ti-chi-bot]

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[ti-srebot]

@nolouch please accept the invitation then you can push to the cherry-pick pull requests.
https://github.com/ti-srebot/pd/invitations

[nolouch]

/merge

[ti-chi-bot]

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

/run-all-tests

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[ti-chi-bot]

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

Commit hash: 7751530

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[nolouch]

/run-integration-ddl-test

[codecov]

Codecov Report

Merging #3525 (7751530) into release-5.0 (9a70cb5) will decrease coverage by 0.13%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release-5.0    #3525      +/-   ##
===============================================
- Coverage        74.59%   74.45%   -0.14%     
===============================================
  Files              245      245              
  Lines            24063    24063              
===============================================
- Hits             17949    17916      -33     
- Misses            4500     4526      +26     
- Partials          1614     1621       +7     

Flag	Coverage Δ
unittests	74.45% <100.00%> (-0.14%)	⬇️

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

Impacted Files	Coverage Δ
server/grpc_service.go	46.60% <100.00%> (-1.02%)	⬇️
server/tso/global_allocator.go	70.80% <0.00%> (-6.57%)	⬇️
server/id/id.go	76.19% <0.00%> (-4.77%)	⬇️
server/tso/allocator_manager.go	73.75% <0.00%> (-4.49%)	⬇️
server/election/leadership.go	83.52% <0.00%> (-3.53%)	⬇️
server/cluster/coordinator.go	74.28% <0.00%> (-0.72%)	⬇️
server/tso/tso.go	71.16% <0.00%> (-0.62%)	⬇️
server/member/member.go	64.67% <0.00%> (-0.55%)	⬇️
client/client.go	72.24% <0.00%> (+0.13%)	⬆️
... and 6 more

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