Fix cancel process

[goccy]

• Ensure that the Pod can be safely stopped even if it is canceled before it becomes Running.
• Allow kubejob-agent to set timeout

[codecov-commenter]

Codecov Report

Merging #61 (ff0867e) into master (90ef5cb) will decrease coverage by 0.02%.
Report is 1 commits behind head on master.
The diff coverage is 100.00%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #61      +/-   ##
==========================================
- Coverage   55.14%   55.12%   -0.02%     
==========================================
  Files          10       10              
  Lines        2109     2117       +8     
==========================================
+ Hits         1163     1167       +4     
- Misses        760      764       +4     
  Partials      186      186