id: fix the bug that id may be duplicated (#3322)

[ti-srebot]

cherry-pick #3322 to release-4.0

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Signed-off-by: Zheng Xiangsheng hundundm@gmail.com

What problem does this PR solve?

• After the PD restarts, the id will be allocated from 1 again. This bug was introduced by id: fix the id allocator is not monotonic #3305.
• Close tidb#22117

What is changed and how it works?

• id: fix the bug that id may be duplicated

Check List

Tests

• Unit test

Related changes

• Need to cherry-pick to the release branch

Release note

• No release note

[ti-srebot]

@HunDunDM you're already a collaborator in bot's repo.

[codecov]

Codecov Report

Merging #3323 (3033a48) into release-4.0 (7b36ffc) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release-4.0    #3323      +/-   ##
===============================================
+ Coverage        74.71%   74.72%   +0.01%     
===============================================
  Files              209      209              
  Lines            19628    19628              
===============================================
+ Hits             14666    14668       +2     
+ Misses            3638     3631       -7     
- Partials          1324     1329       +5     

Flag	Coverage Δ
unittests	74.72% <100.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
server/id/id.go	85.71% <100.00%> (+9.52%)	⬆️
server/heartbeat_streams.go	65.93% <0.00%> (-6.60%)	⬇️
server/region_syncer/client.go	78.74% <0.00%> (-4.73%)	⬇️
server/tso/tso.go	77.53% <0.00%> (-2.90%)	⬇️
server/core/storage.go	67.88% <0.00%> (-0.92%)	⬇️
server/grpc_service.go	59.27% <0.00%> (-0.61%)	⬇️
server/server.go	73.30% <0.00%> (-0.50%)	⬇️
server/handler.go	44.27% <0.00%> (-0.50%)	⬇️
server/cluster/cluster.go	79.57% <0.00%> (-0.13%)	⬇️
client/client.go	69.03% <0.00%> (ø)
... and 6 more

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[HunDunDM]

/merge

[ti-chi-bot]

@HunDunDM: 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: 3033a48