OSX code signing debug

[wpotrzebowski]

Description

Code signing on Mac is failing and needs debugging

Fixes # (issue/issues)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Review Checklist:

[if using the editor, use [x] in place of [ ] to check a box]

Documentation (check at least one)

• There is nothing that needs documenting
• Documentation changes are in this PR
• There is an issue open for the documentation (link?)

Installers

• There is a chance this will affect the installers, if so
  • Windows installer (GH artifact) has been tested (installed and worked)
  • MacOSX installer (GH artifact) has been tested (installed and worked)

Licencing (untick if necessary)

• The introduced changes comply with SasView license (BSD 3-Clause)

[krzywon]

The Mac installer failure was due to a 'Resource busy' error, not a code signing error. We could rerun that step to be sure everything is working, but the parallel pull request runner succeeded. I think this looks ready to go. Great work, @wpotrzebowski and @timsnow!

[wpotrzebowski]

@krzywon yes, I've just tested the installer and indeed it works! (I need to do some clean-ups with GH actions secrets but we should be back on track now)

[lucas-wilkins]

Wohooo! Nice work guys!

[krzywon]

@wpotrzebowski, I know you would like to do some cleanup, but I would like to have the beta out today and this solves the last two outstanding issues.

I'm going to merge this and ask that you do any cleanup work in a different branch.