[DOP-22578] Change response schema of GET /jobs

[dolfinus]

Change Summary

Changed the response schema of GET /jobs to match other endpoints (#158, #159, #160, #161). For now there is no statistics for job, but it can be added later (e.g. number of runs since last day, week, month) without breaking backward compatibility.

Related issue number

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

Attention: Patch coverage is 96.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.16%. Comparing base (5e52684) to head (d02f6cb).
Report is 135 commits behind head on develop.

Files with missing lines	Patch %	Lines
data_rentgen/server/services/job.py	94.11%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #162      +/-   ##
===========================================
+ Coverage    93.14%   93.16%   +0.01%     
===========================================
  Files          183      185       +2     
  Lines         4188     4228      +40     
  Branches       281      281              
===========================================
+ Hits          3901     3939      +38     
- Misses         225      227       +2     
  Partials        62       62              

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