Add esa data parser to cubeviz

[javerbukh]

Description

This pull request is to address esa pipeline data not being loaded into cubeviz.

Checklist for package maintainer(s)

This checklist is meant to remind the package maintainer(s) who will review this pull request of some common things to look for. This list is not exhaustive.

• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a change log needed? If yes, is it added to CHANGES.rst?
• Is a milestone set?
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)?

[codecov]

Codecov Report

Merging #1227 (78f42fd) into main (522392e) will decrease coverage by 0.15%.
The diff coverage is 21.05%.

@@            Coverage Diff             @@
##             main    #1227      +/-   ##
==========================================
- Coverage   77.99%   77.83%   -0.16%     
==========================================
  Files          90       90              
  Lines        7179     7197      +18     
==========================================
+ Hits         5599     5602       +3     
- Misses       1580     1595      +15     

Impacted Files	Coverage Δ
jdaviz/configs/cubeviz/plugins/parsers.py	56.61% <21.05%> (-6.10%)	⬇️

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[pllim]

Since this is a hack on super secret data, it is ok to not test as long as Patrick okays this solution.

[kecnry]

Code looks reasonable enough to me (but haven't tested on the actual data locally)

[PatrickOgle]

Works as advertised, loading the data from FITS with a single command:
cubeviz.load_data("Cube.fits")