Add gitPrivateToken support again

[Philipp-M]

Changes

#310 accidentally removed support for gitPrivateToken

This PR should fix this again.
Also transitive ssh://git@github.com url substition did not work for me which is the reason for the change in dist/platforms/ubuntu/steps/set_gitcredential.sh

Checklist

• Read the contribution guide and accept the code of conduct
• Readme (updated or not needed)
• Tests (added, updated or not needed)

[github-actions]

[webbertakken]

Thank you very much for also providing the fix! Looks good for me.
Can you confirm that this works?

[Philipp-M]

Yes, I tested this way too long actully :)

[codecov-commenter]

Codecov Report

Merging #377 (c034ac6) into main (40891d6) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

❗ Current head c034ac6 differs from pull request most recent head a2ee3c1. Consider uploading reports for the commit a2ee3c1 to get more accurate results

@@            Coverage Diff             @@
##             main     #377      +/-   ##
==========================================
- Coverage   44.98%   44.92%   -0.07%     
==========================================
  Files          51       51              
  Lines        1485     1487       +2     
  Branches      230      259      +29     
==========================================
  Hits          668      668              
+ Misses        813      779      -34     
- Partials        4       40      +36     

Impacted Files	Coverage Δ
src/model/docker.ts	17.24% <0.00%> (-1.28%)	⬇️
src/model/input.ts	85.48% <0.00%> (ø)
src/model/system.ts	86.84% <0.00%> (ø)
src/model/image-tag.ts	49.42% <0.00%> (ø)
src/model/cloud-runner/aws/index.ts	17.50% <0.00%> (ø)
src/model/cloud-runner/k8s/index.ts	11.34% <0.00%> (ø)
src/model/image-environment-factory.ts	11.11% <0.00%> (ø)
src/model/cloud-runner/aws/aws-error.ts	36.36% <0.00%> (ø)
src/model/cloud-runner/aws/aws-job-stack.ts	9.52% <0.00%> (ø)
... and 8 more

[webbertakken]

Released in v2.0.2