add cpu limit for yurthub

[huweihuang]

What type of PR is this?

/kind bug

What this PR does / why we need it:

there is not cpu limit for yurthub, it will cause the yurthub cost too much CPU, causing high node load and affecting other services.

Which issue(s) this PR fixes:

Fixes ##1605

Special notes for your reviewer:

/assign @rambohe-ch

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In response to this:

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes ##1605

Special notes for your reviewer:

@rambohe-ch

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[openyurt-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: huweihuang
To complete the pull request process, please assign rambohe-ch
You can assign the PR to them by writing /assign @rambohe-ch in a comment when ready.

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #1609 (6a75a4d) into master (7f41a78) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1609      +/-   ##
==========================================
+ Coverage   51.42%   51.43%   +0.01%     
==========================================
  Files         134      134              
  Lines       15947    15947              
==========================================
+ Hits         8200     8202       +2     
+ Misses       7001     7000       -1     
+ Partials      746      745       -1     

Flag	Coverage Δ
unittests	51.43% <ø> (+0.01%)	⬆️

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

see 1 file with indirect coverage changes

[rambohe-ch]

/lgtm

[rambohe-ch]

/approve