Add a poller for JAWS jobs

[MrCreosote]

No description provided.

[MrCreosote]

Codecov seems to be consistently very slow in the AM

[codecov]

Codecov Report

Attention: Patch coverage is 31.81818% with 30 lines in your changes missing coverage. Please review.

Project coverage is 54.80%. Comparing base (765dec3) to head (3e9c76d).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/jaws/poller.py	32.14%	19 Missing ⚠️
cdmtaskservice/jaws/client.py	22.22%	7 Missing ⚠️
cdmtaskservice/jobflows/nersc_jaws.py	42.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #158      +/-   ##
==========================================
- Coverage   55.24%   54.80%   -0.45%     
==========================================
  Files          34       35       +1     
  Lines        2134     2175      +41     
==========================================
+ Hits         1179     1192      +13     
- Misses        955      983      +28     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Tianhao-Gu]

LGTM.