fix: yurt-controller-manager reboot cannot remove taint node.openyurt.io/unschedulable (#1233)

[AndyEWang]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The taint node.openyurt.io/unschedulable can not be removed after the failure node recovers during yurt-controller-manager reboot.

Which issue(s) this PR fixes:

Fixes #1233

Special notes for your reviewer:

/assign @rambohe-ch

Does this PR introduce a user-facing change?

NONE

other Note

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

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[codecov]

Codecov Report

Merging #1337 (162bb1c) into master (3ee1eff) will increase coverage by 0.08%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master    #1337      +/-   ##
==========================================
+ Coverage   53.01%   53.10%   +0.08%     
==========================================
  Files         102      102              
  Lines       12833    12838       +5     
==========================================
+ Hits         6803     6817      +14     
+ Misses       5472     5464       -8     
+ Partials      558      557       -1     

Flag	Coverage Δ
unittests	53.10% <33.33%> (+0.08%)	⬆️

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

Impacted Files	Coverage Δ
...inator/delegatelease/poolcoordinator_controller.go	38.29% <33.33%> (+0.06%)	⬆️

... and 1 file with indirect coverage changes

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[rambohe-ch]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [rambohe-ch]

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