test(operator): add chaos mock and test case for ssChaos

[moomman]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Test

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?

#272

[codecov-commenter]

Codecov Report

Merging #343 (b0d7963) into main (425af16) will increase coverage by 1.43%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #343      +/-   ##
==========================================
+ Coverage   41.52%   42.95%   +1.43%     
==========================================
  Files          47       47              
  Lines        5019     5031      +12     
==========================================
+ Hits         2084     2161      +77     
+ Misses       2793     2718      -75     
- Partials      142      152      +10     

Impacted Files	Coverage Δ
...pkg/controllers/shardingsphere_chaos_controller.go	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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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