[Env] Allow installing shamrock executable with pip

[tdavidcl]

Allow installing shamrock executable with pip

This PR finally implement a way to install both the pylib and the executable when using pip install (thanks to the solution provided in pypa/setuptools#210 (comment)).

Additionally _pysetup.py was moved to env helpers.

Lastly, this PR removes --pylib and will systematically copy setup.py to the builddir if the env supports it.

[github-actions]

Workflow report

workflow report corresponding to commit 715d92e
Commiter email is timothee.davidcleris@proton.me

Pre-commit check report

Pre-commit check: ✅

trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check for merge conflicts................................................Passed
check that executables have shebangs.....................................Passed
check that scripts with shebangs are executable..........................Passed
check for added large files..............................................Passed
check for case conflicts.................................................Passed
check for broken symlinks............................(no files to check)Skipped
check yaml...............................................................Passed
detect private key.......................................................Passed
No-tabs checker..........................................................Passed
Tabs remover.............................................................Passed
Validate GitHub Workflows................................................Passed
clang-format.............................................................Passed
black....................................................................Passed
isort....................................................................Passed
Check doxygen headers....................................................Passed
Check license headers....................................................Passed
Check #pragma once.......................................................Passed
Check SYCL #include......................................................Passed

Test pipeline can run.

Clang-tidy diff report

No relevant changes found.
Well done!

You should now go back to your normal life and enjoy a hopefully sunny day while waiting for the review.

Doxygen diff with main

Removed warnings : 0
New warnings : 0
Warnings count : 5736 → 5736 (0.0%)

Detailed changes :