Remove obsolete GeoModelCppHelpers package and clean code

This MR removes the now obsolete GeoModelCppHelpers package: all its methods have been moved to the global helper package GeoModelCore/GeoModelHelpers.

This "fixes" the issue with the CMake include configuration spotted by @akraszna in !333 (closed) by completely removing the offending package.

The MR also fix one of the GeoStrUtils helpers by adding a missing template type (Cc: @jojungge)

Cc: @tsulaia @boudreau @akraszna

added CMake configuration GeoModelCore GeoModelHelpers GeoModelIO labels

added 3 commits

• ebba5321...59d53ef5 - 2 commits from branch main
• d4ae1590 - Merge remote-tracking branch 'origin/main' into CleanCode

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changed the description

@rbianchi, before going any further with it, do you have any idea why the dumps crashed? Thanks

resolved all threads

added 5 commits

• 8e971a00 - 1 commit from branch main
• 8c8a5681 - Remove old code
• b6718243 - Fix missing template
• 698c64e9 - Move to global helper functions
• 2da03554 - Remove obsolete helper package, now moved to global helpers

Compare with previous version

enabled an automatic merge when the pipeline for 2da03554 succeeds

@jojungge , thanks for having set the "auto-merge", but, unfortunately, the pipeline would never succeed due to the crash at the exit in the dump tests.

So, if @tsulaia agrees, I guess we just need to merge that manually.

aborted the automatic merge because target branch was updated

added 5 commits

• 22b53872 - 1 commit from branch main
• d5bfd277 - Remove old code
• fe943211 - Fix missing template
• c2557699 - Move to global helper functions
• 83411edd - Remove obsolete helper package, now moved to global helpers

Compare with previous version

OK, I'm going to go ahead and merge this one, and then proceed with releasing 6.2.0

merged