feat: change job gc interval in manager

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[chlins]

lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.79%. Comparing base (395fc6c) to head (b131d5e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3591      +/-   ##
==========================================
- Coverage   35.83%   35.79%   -0.04%     
==========================================
  Files         335      335              
  Lines       36962    36962              
==========================================
- Hits        13245    13231      -14     
- Misses      22882    22892      +10     
- Partials      835      839       +4     

Flag	Coverage Δ
unittests	35.79% <ø> (-0.04%)	⬇️

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see 4 files with indirect coverage changes