Tools - makecorever.py fixed packaging & avoid needless overwrites

[mcspr]

amend #9248

rewrite ci build pattern to only rewrite core_version.h once per job
restore behaviour from #6414 for other cases

update packaging script w/ new arguments

[Copilot]

Pull Request Overview

This PR resolves issue #9248 by refining the CI build process so that core_version.h is updated only once per job and restores previous behavior for other cases. It also updates packaging and test scripts to accommodate new arguments for makecorever.py.

• Refactor generate() in makecorever.py to return version content instead of writing directly to an output stream.
• Update test and packaging scripts to use new CLI arguments for makecorever.py.
• Modify prebuild hook command in tests/common.sh to reflect the updated tooling.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
tools/makecorever.py	Refactored generate() and adjusted file output handling.
tests/sanity_check.sh	Updated invocation to use new CLI arguments for makecorever.py.
tests/common.sh	Added a prebuild hook pattern with new arguments in the command line.
package/build_boards_manager_package.sh	Revised command line arguments for makecorever.py in the packaging script.