Trigger Linux-Distributions jobs on PRs

[piponazo]

Is your feature request related to a problem?

I noticed that the "Nightly - Linux Distributions" builds is failing on the main branch after merging #2090. However, in that PR all the CI checks were passing.

Describe the solution you would like

It would be good to also trigger the "Linux Distributions" builds in PRs, so that we do not end up breaking something in mian without noticing in the PRs.

We would just need to change .github/workflows)/nightly_Linux_distributions.yml so that it runs on PRs.

Furthermore, we should fix the current issue on main. It is complaining about undefined references to std::filesystem:

[100%] Linking CXX executable ../bin/exiv2
CMakeFiles/exiv2.dir/actions.cpp.o: In function `(anonymous namespace)::metacopy(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, bool)':
actions.cpp:(.text+0xa4e7): undefined reference to `std::filesystem::__cxx11::path::_M_split_cmpts()'
actions.cpp:(.text+0xa4f7): undefined reference to `std::filesystem::temp_directory_path[abi:cxx11]()'
actions.cpp:(.text+0xa50f): undefined reference to `std::filesystem::__cxx11::path::has_root_directory() cons
...

Something like this should work.

[hassec]

Running the entire workflow on PRs might be a lot. (It's 48 builds)
But I do think it makes sense to have a build of one of the older distros in the PR pipeline 👍

[piponazo]

I agree that it might be intimidating to have so many CI stuff in PRs , but it is actually one of the CI pipelines that take less time:

It takes half of the time that the "Windows Matrix" pipeline last. And if the CI pipelines run in parallel we should not get any delay.

[hassec]

I didn't realize that pipeline was that quick. That's way quicker than many of the windows pipelines 😅
In that case 👍 from me

(but in that case let's rename it and have one workflow for "full linux" test)