metrics/grafana: fix Error showing "Current ID assignment"

[HuSharp]

Signed-off-by: husharp jinhao.hu@pingcap.com

What problem does this PR solve?

Issue Number: Close #5898

What is changed and how does it work?

The old version of idalloc is a globally unique path, and keyspace needs to use id allocator to allocate keyspaceID, so in this pr the id allocator is changed to a general purpose, but not sync metrics.
https://github.com/tikv/pd/pull/5284

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• rleungx

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[ti-chi-bot]

Hi @HuSharp. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[codecov]

Codecov Report

Base: 75.54% // Head: 75.75% // Increases project coverage by +0.21% 🎉

Coverage data is based on head (2f49e0f) compared to base (abb62d2).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5899      +/-   ##
==========================================
+ Coverage   75.54%   75.75%   +0.21%     
==========================================
  Files         343      343              
  Lines       34993    34993              
==========================================
+ Hits        26434    26509      +75     
+ Misses       6275     6228      -47     
+ Partials     2284     2256      -28     

Flag	Coverage Δ
unittests	75.75% <ø> (+0.21%)	⬆️

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

Impacted Files	Coverage Δ
pkg/storage/endpoint/meta.go	63.63% <0.00%> (-4.55%)	⬇️
pkg/utils/etcdutil/etcdutil.go	82.55% <0.00%> (-2.33%)	⬇️
server/api/region.go	68.09% <0.00%> (-1.43%)	⬇️
server/schedule/region_scatterer.go	77.86% <0.00%> (-1.19%)	⬇️
pkg/btree/btree_generic.go	86.34% <0.00%> (-0.93%)	⬇️
server/cluster/coordinator.go	71.59% <0.00%> (-0.76%)	⬇️
server/schedule/operator/step.go	76.76% <0.00%> (-0.69%)	⬇️
pkg/member/member.go	63.68% <0.00%> (-0.53%)	⬇️
server/cluster/cluster.go	81.76% <0.00%> (-0.43%)	⬇️
server/config/persist_options.go	92.83% <0.00%> (-0.33%)	⬇️
... and 20 more

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[JmPotato]

/merge

[ti-chi-bot]

@JmPotato: 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.

Details

Commit hash: 4490dab

[HuSharp]

/test build

[ti-chi-bot]

@HuSharp: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

Details

In response to this:

/test build

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[rleungx]

/ok-to-test

[ti-chi-bot]

@JmPotato: failed to apply #5899 on top of branch "release-6.6":

failed to git commit: exit status 1

Details

In response to this:

/cherry-pick release-6.6

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[JmPotato]

/cherry-pick release-6.5

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #6016.

[ti-chi-bot]

@JmPotato: new pull request could not be created: failed to create pull request against tikv/pd#release-6.5 from head ti-chi-bot:cherry-pick-5899-to-release-6.5: status code 422 not one of [201], body: {"message":"Validation Failed","errors":[{"resource":"PullRequest","code":"custom","message":"A pull request already exists for ti-chi-bot:cherry-pick-5899-to-release-6.5."}],"documentation_url":"https://docs.github.com/rest/reference/pulls#create-a-pull-request"}

Details

In response to this:

/cherry-pick release-6.5

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