feat: add CreateJobCount and CreateJobSuccessCount metrics

[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

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 35.93%. Comparing base (030f337) to head (ef0d9ef).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
manager/service/job.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3588      +/-   ##
==========================================
- Coverage   36.33%   35.93%   -0.41%     
==========================================
  Files         335      335              
  Lines       31112    36848    +5736     
==========================================
+ Hits        11305    13241    +1936     
- Misses      18970    22768    +3798     
- Partials      837      839       +2     

Flag	Coverage Δ
unittests	35.93% <25.00%> (-0.41%)	⬇️

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

Files with missing lines	Coverage Δ
manager/handlers/job.go	60.00% <100.00%> (-3.86%)	⬇️
manager/metrics/metrics.go	100.00% <ø> (ø)
manager/service/job.go	0.00% <0.00%> (ø)

... and 260 files with indirect coverage changes

[fcgxz2003]

LGTM

[CormickKneey]

lgtm