PoC github action runner macos-14

[drwetter]

Describe your changes

This is a PoC which tries incrementally to get the github actions working for the provided macos-14 runner . Reason: we missed a few incompatibilities in the past, see #2760, #2707, #2705 etc --mostly because of LibresSSL and bash version 3.

For now it uses a modified Ubuntu runner from the main branch. Goal is to use all the checks for MacOS , except the ones which won't work (MacOS doesn't have timeoute.g.) .

What is your pull request about?

• Bug fix
• Improvement
• New feature (adds functionality)
• Breaking change (bug fix, feature or improvement that would cause existing functionality to not work as expected)
• Typo fix
• Documentation update
• Update of other files

If it's a code change please check the boxes which are applicable

• For the main program: My edits contain no tabs, indentation is five spaces and any line endings do not contain any blank chars
• I've read CONTRIBUTING.md and Coding_Convention.md
• I have tested this fix or improvement against >=2 hosts and I couldn't spot a problem
• I have tested this new feature against >=2 hosts which show this feature and >=2 host which does not (in order to avoid side effects) . I couldn't spot a problem
• For the new feature I have made corresponding changes to the documentation and / or to help()
• If it's a bigger change: I added myself to CREDITS.md (alphabetical order) and the change to CHANGELOG.md

[drwetter]

Problem: curl via homebrew comes with openssl. This is not what we want to use for this runner.

[drwetter]

For persisting the info: replacing 1x echo by /usr/bin/echo worked then for the macos runner. But that's ugly.