[INFRA] Prevent Actions workflows from running on people's forks

[ymzayek]

• Closes #

I noticed all these workflows will get triggered when people work on PRs from the main branch of their fork or any time they push to their main branch.

[Remi-Gau]

good catch

I would still let the fast CI workflows run on forks ,no?

• black
• flake8
• codespell
• fstrings

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[ymzayek]

I would still let the fast CI workflows run on forks ,no?

Ok that's fine

[codecov]

Codecov Report

Merging #3900 (93a7062) into main (6fe4c71) will increase coverage by 0.06%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3900      +/-   ##
==========================================
+ Coverage   91.53%   91.60%   +0.06%     
==========================================
  Files         134      134              
  Lines       15751    15751              
  Branches     3281     3281              
==========================================
+ Hits        14418    14429      +11     
+ Misses        784      772      -12     
- Partials      549      550       +1     

Flag	Coverage Δ
macos-latest_3.10	?
macos-latest_3.11	?
macos-latest_3.8	?
macos-latest_3.9	?
ubuntu-latest_3.10	91.53% <ø> (ø)
ubuntu-latest_3.11	91.53% <ø> (ø)
ubuntu-latest_3.8	91.49% <ø> (ø)
ubuntu-latest_3.9	91.49% <ø> (ø)
windows-latest_3.10	91.47% <ø> (ø)
windows-latest_3.11	?
windows-latest_3.8	91.43% <ø> (ø)
windows-latest_3.9	?

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see 11 files with indirect coverage changes

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