DEV: Fix editable install on Windows (try 2)

[pllim]

Description

This pull request is another attempt to improve quality of life for developers that have to develop Jdaviz on Windows. This is the basic fix from #1218 before we tried to get too fancy. The logic should not affect Linux/OSX at all but devs should check.

• Fixes Windows setup.py: Symlinking requires Admin Privileges  #925
• Fixes Windows setup.py: relpath breaks when Python and code on different disks #1213

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 #1234 (a1a3a8a) into main (d08a4ea) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1234      +/-   ##
==========================================
- Coverage   77.93%   77.84%   -0.09%     
==========================================
  Files          90       90              
  Lines        7205     7205              
==========================================
- Hits         5615     5609       -6     
- Misses       1590     1596       +6     

Impacted Files	Coverage Δ
...configs/default/plugins/data_tools/file_chooser.py	65.71% <0.00%> (-3.43%)	⬇️

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[javerbukh]

Works on both MacOS and Windows! I did run into #1245 while testing on MacOS + Chrome but interestingly, I did not see the same bug on Windows + Chrome.

[pllim]

Just need one more approval then. @duytnguyendtn , do you want to test this out? Thanks!

[pllim]

I actually need this to be able to install Jdaviz dev , and given there is one approval, I am going to YOLO a bit and merge this. Thanks, all!