BUGFIX: cleanmask support for sdintimaging

[low-sky]

The new sdintimaging code crashes out when a cleanmask is used. It tries to use the joint cube as a header template for aligning the clean mask. That cube doesn't exist at the time when the alignment code is called. This bug fix uses the regridded single dish cube as a header template instead.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 6.27%. Comparing base (e4693b8) to head (a53d33b).

Files with missing lines	Patch %	Lines
phangsPipeline/handlerImaging.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #360      +/-   ##
=========================================
- Coverage    6.27%   6.27%   -0.01%     
=========================================
  Files          38      38              
  Lines       15238   15242       +4     
  Branches     3662    3664       +2     
=========================================
  Hits          956     956              
- Misses      14268   14272       +4     
  Partials       14      14              

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[thomaswilliamsastro]

This seems reasonable to me. Just to check, the .int file also doesn't exist at this point? If that does, I'd suggest using that over the .sd, just for readability

[low-sky]

It didn't actually exist at this point but agree that int would be best to template off.