Avoid additional python version file to wrong location

[ellert]

This Pull request:

Changes or fixes:

Install _python_version.py in ROOT sub directory,

Checklist:

• tested changes locally
• updated the docs (if necessary)

[guitargeek]

Wait I don't understand: when I build and install ROOT master, the _python_version.py already ends up in the ROOT subdirectory, because the ${python_version_file} variable is already set to "${localruntimedir}/ROOT/_python_version.py".

I don't disagree with this PR, but it would be good to understand what is going on here 🙂

[github-actions]

Test Results

    21 files      21 suites   2d 22h 23m 22s ⏱️
 3 809 tests  3 809 ✅ 0 💤 0 ❌
72 145 runs  72 145 ✅ 0 💤 0 ❌

Results for commit a19eb25.

♻️ This comment has been updated with latest results.

[guitargeek]

Ok I get it now. The file was already correctly implicitly installed by install(DIRECTORY ...) in the ROOT_PYTHON_PACKAGE function. And I think the cleanest fix is just to avoid the additional install command altogether. I have updated the PR accordingly.

[guitargeek]

Thanks for spotting this!