CDM-291: Add admin endpoint to clean up NERSC refdata files

[MrCreosote]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 35.29412% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.62%. Comparing base (90c797c) to head (526d2db).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/routes.py	28.57%	5 Missing ⚠️
cdmtaskservice/jobflows/nersc_jaws.py	20.00%	4 Missing ⚠️
cdmtaskservice/jobflows/lawrencium_jaws.py	50.00%	1 Missing ⚠️
cdmtaskservice/nersc/manager.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #368      +/-   ##
==========================================
- Coverage   52.71%   52.62%   -0.09%     
==========================================
  Files          44       44              
  Lines        3616     3633      +17     
==========================================
+ Hits         1906     1912       +6     
- Misses       1710     1721      +11     

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