Split job submit from job state

[MrCreosote]

The nersc / jaws flow manager has a dependency on job state as it'll need to get and update the state. The job submission code will have a dependency on the ners / jaws flow manager, and so needs to be split out to avoid a circular import.

[codecov]

Codecov Report

Attention: Patch coverage is 36.95652% with 29 lines in your changes missing coverage. Please review.

Project coverage is 56.14%. Comparing base (f7eb823) to head (944b7a6).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/job_submit.py	34.21%	25 Missing ⚠️
cdmtaskservice/app_state.py	50.00%	2 Missing ⚠️
cdmtaskservice/routes.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #126      +/-   ##
==========================================
+ Coverage   56.00%   56.14%   +0.13%     
==========================================
  Files          29       30       +1     
  Lines        1764     1774      +10     
==========================================
+ Hits          988      996       +8     
- Misses        776      778       +2     

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[Tianhao-Gu]

lgtm