Rework formatters

[alkino]

• Delete partial check and format for clang-format
• Filters are now relative to the directory
• Use git ls-tree instead of cmake-compile.json file

Removed CMake options:

• {PROJECT_NAME}_FORMATTING_ON
• [PROJECT_NAME]_FORMATTING_CPP_CHANGES_ONLY
• [PROJECT_NAME}_FORMATTING_NO_SUBMODULES

Removed python options:

• -B
• --git-modules
• --applies-on
• --changes-only
• --clang-format-diff-executables

Closes https://github.com/BlueBrain/hpc-coding-conventions/issues/104.

[alkino]

You can see usage here: https://github.com/BlueBrain/nmodl/pull/836 And here: https://github.com/BlueBrain/CoreNeuron/pull/794

[alkino]

So @tristan0x you are against removing the partial check/format?

[tristan0x]

I am using this option, please keep it for now. git-clang-format didn't exist when --applies-on has been added. I am ok to remove it only when this project switches to git-clang-format

On second thought, let's nuke that part of the code.

[alkino]

nmodl and coreneuron works well with this new simplified version

[alkino]

I will merge it at 2pm if no one complains before