resource_manager: fix gosigar import package

[HuSharp]

What problem does this PR solve?

Issue Number: Close #6734

What is changed and how does it work?

In TiDB we introduced cloudfoundry/gosigar
But in PD we introduced elastic/gosigar
Some compatibility issues may be encountered in both components

Check List

Tests

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

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• CabinfeverB
• lhy1024

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[bufferflies]

why import this?

[HuSharp]

because this pr forget to add it
https://github.com/tikv/pd/pull/6699/files#diff-6e9d6d039becbedf1b1469724f64b7a7c5ecf74a0d9bc24b29ca5e0681443ccdR36

[bufferflies]

rest lgtm

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.21 🎉

Comparison is base (9a3af11) 74.31% compared to head (484c5fd) 74.53%.

❗ Current head 484c5fd differs from pull request most recent head 4449094. Consider uploading reports for the commit 4449094 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6735      +/-   ##
==========================================
+ Coverage   74.31%   74.53%   +0.21%     
==========================================
  Files         411      417       +6     
  Lines       42960    43630     +670     
==========================================
+ Hits        31927    32520     +593     
- Misses       8176     8216      +40     
- Partials     2857     2894      +37     

Flag	Coverage Δ
unittests	74.53% <100.00%> (+0.21%)	⬆️

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

Impacted Files	Coverage Δ
client/resource_group/controller/model.go	57.57% <100.00%> (ø)

... and 55 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
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[HuSharp]

/check-issue-triage-complete

[bufferflies]

/merge

[ti-chi-bot]

@bufferflies: 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: 484c5fd

[ti-chi-bot]

@HuSharp: Your PR was out of date, I have automatically updated it for you.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

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