【FIX】fix yurthub dnsPolicy when using pool-coordinator

[JameKeal]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

/kind bug

What this PR does / why we need it:

YurtHub not set dnsPolicy, it use ClusterFirst in default, but it set hostNetwork=true, dnsPolicy turns into None, it`s means yurtHub only the resolution configured in dnsConfig is used, cluster and node resolution is not used.

It`s error when yurthub use pool-coordinator by services.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

@rambohe-ch

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

/kind bug

What this PR does / why we need it:

YurtHub not set dnsPolicy, it use ClusterFirst in default, but it set hostNetwork=true, dnsPolicy turns into None, it`s means yurtHub only the resolution configured in dnsConfig is used, cluster and node resolution is not used.

It`s error when yurthub use pool-coordinator by services.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[codecov]

Codecov Report

Merging #1321 (d4bc60b) into master (056ba74) will decrease coverage by 0.32%.
The diff coverage is 24.61%.

❗ Current head d4bc60b differs from pull request most recent head 1314e29. Consider uploading reports for the commit 1314e29 to get more accurate results

@@            Coverage Diff             @@
##           master    #1321      +/-   ##
==========================================
- Coverage   53.28%   52.97%   -0.32%     
==========================================
  Files         102      103       +1     
  Lines       12776    12924     +148     
==========================================
+ Hits         6808     6846      +38     
- Misses       5413     5520     +107     
- Partials      555      558       +3     

Flag	Coverage Δ
unittests	52.97% <24.61%> (-0.32%)	⬇️

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

Impacted Files	Coverage Δ
...g/controller/csrapprover/csrapprover_controller.go	26.84% <0.00%> (-1.21%)	⬇️
pkg/yurthub/server/server.go	0.00% <0.00%> (ø)
pkg/yurthub/certificate/token/token.go	57.00% <14.58%> (-7.81%)	⬇️
...coordinator/cert/poolcoordinatorcert_controller.go	16.37% <17.50%> (ø)
...inator/delegatelease/poolcoordinator_controller.go	32.72% <33.33%> (-5.51%)	⬇️
pkg/yurtadm/util/error/error.go	40.47% <40.47%> (ø)
pkg/controller/poolcoordinator/cert/certificate.go	49.83% <57.14%> (ø)
pkg/controller/poolcoordinator/cert/util.go	84.84% <66.66%> (+42.42%)	⬆️
cmd/yurthub/app/config/config.go	53.25% <100.00%> (+0.17%)	⬆️
cmd/yurthub/app/options/options.go	94.67% <100.00%> (+0.06%)	⬆️
... and 2 more

... and 3 files with indirect coverage changes

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[Congrool]

/lgtm

[Congrool]

/hold

We should figure out why e2e tests failed. @JameKeal Could you please use command make local-up-openyurt at your local host to check if it can succeed?

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[rambohe-ch]

@Congrool PTAL

[Congrool]

/unhold

Thanks for your contribution! It's ready for merge I think. @rambohe-ch

[Congrool]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JameKeal, rambohe-ch

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