added option to not re-download cutouts

[astrophpeter]

Fixes # .

Description of the Change

Added settings option to not re-download cutouts if they already exist.

Checklist

Please check all that apply to your proposed changes

• HTML code change
• Added package dependency
• Added data
• Changed django model
• Documentation change
• Added or changed TaskRunner

Additional context

[codecov]

Codecov Report

Merging #134 (993e8ce) into main (0c3de20) will decrease coverage by 4.53%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #134      +/-   ##
==========================================
- Coverage   66.41%   61.88%   -4.54%     
==========================================
  Files          21       21              
  Lines        1566     1574       +8     
==========================================
- Hits         1040      974      -66     
- Misses        526      600      +74     

Impacted Files	Coverage Δ
app/host/cutouts.py	27.41% <0.00%> (-4.07%)	⬇️
app/host/prospector.py	29.87% <0.00%> (-61.04%)	⬇️
app/host/transient_tasks.py	61.20% <0.00%> (-7.76%)	⬇️
app/host/photometric_calibration.py	52.17% <0.00%> (-4.35%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.