992 download boost libs with URL instead of git repo

[dabele]

Changes and Information

Download boost libs from a URL instead of git repository, archive download is much faster. Removed the bootstrapping code. With this increased speed, a minimal boost version is not necessary and not worth the maintenance.

Results from CI: compile times (with ccache and boost URL download) are down to ~4 mins, before they were at 20+. Obviously depends on many ccache hits and misses there are.

Not using the URL from github (e.g. https://github.com/boostorg/boost/archive/refs/tags/boost-1.84.0.tar.gz) since those archives don't actually contain the source code. I think the archive generation is automated, but the boost repo requires more setup before it is complete (subrepos, bootstrapping).

Merge Request - Guideline Checklist

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Closes #992

Checks by code author

• [x] Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• [x] New code adheres to coding guidelines
• [x] No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• [x] Tests are added for new functionality and a local test run was successful (with and without OpenMP)
• [x] Appropriate documentation for new functionality has been added (Doxygen in the code and Markdown files if necessary)
• [x] Proper attention to licenses, especially no new third-party software with conflicting license has been added
• [ ] (For ABM development) Checked benchmark results and ran and posted a local test above from before and after development to ensure performance is monitored.

Checks by code reviewer(s)

• [x] Corresponding issue(s) is/are linked and addressed
• [x] Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• [x] Appropriate unit tests have been added, CI passes, code coverage and performance is acceptable (did not decrease)
• [x] No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• [x] On merge, add 2-5 lines with the changes (main added features, changed items, or corrected bugs) to the merge-commit-message. This can be taken from the briefly-list-the-changes above (best case) or the separate commit messages (worst case).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.23%. Comparing base (2994f76) to head (bdde5c7). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1048 +/- ## ======================================= Coverage 96.23% 96.23% ======================================= Files 128 128 Lines 10852 10852 ======================================= Hits 10443 10443 Misses 409 409 ```

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[mknaranja]

@reneSchm @dabele What's the time reduction for download itself?

@lenaploetzke just FYI :)

[dabele]

What's the time reduction for download itself?

archive download is a < 10 secs, git clone is 1-2 mins, rough estimate, I didn't measure exactly.