ci(build-main): disable failing MacOS runners

[SuperITMan]

MacOS jobs are always failing due to a GitHub limitation when downloading the GeckoDriver from GitHub for Protractor

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[X] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

All the plans running on macos runners are failing due to a download, by Protractor, of GeckoDriver on GitHub.
It hits an API rate limit of GitHub: actions/runner-images#602

What is the new behavior?

We can easily see if a PR is ok if no failed jobs.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[coveralls]

Coverage remained the same at 88.208% when pulling 5dad934 on SuperITMan:bugfix/ci-disable-failing-macos-runners into 6a105d7 on NationalBankBelgium:master.