feat: support SIGUSR1 signal for yurthub

[y-ykcir]

What type of PR is this?

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/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #1475

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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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

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #1475

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[codecov]

Codecov Report

Merging #1487 (7e199ee) into master (b3ae2c7) will decrease coverage by 0.31%.
The diff coverage is 91.42%.

@@            Coverage Diff             @@
##           master    #1487      +/-   ##
==========================================
- Coverage   50.74%   50.43%   -0.31%     
==========================================
  Files         131      133       +2     
  Lines       15576    15818     +242     
==========================================
+ Hits         7904     7978      +74     
- Misses       6951     7107     +156     
- Partials      721      733      +12     

Flag	Coverage Δ
unittests	50.43% <91.42%> (-0.31%)	⬇️

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

Impacted Files	Coverage Δ
pkg/yurthub/util/dumpstack.go	91.42% <91.42%> (ø)

... and 5 files with indirect coverage changes

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
3.3% Duplication

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[rambohe-ch]

/lgtm