Cppcheck buffered file only (#3983)

* Add cppcheck handler match on misra msg

* Use --file-filter cppcheck option

Cppcheck recently added --file-filter so that cppcheck only checks the
filtered files, even when using --project option, which checks all files
in the project, by default. The --ccpcheck-build-dir option didn't help
enough (at all?).

* Added C test cases

Also fixed and assumed typo: foo.c, instead of foo.cpp

* Replace hard-coded full path filenames

Attempt to fix the windows platform test execution.

* Fix typo - foo.c, instead of foo.cpp

* Reset buffer var between tests

* Handle header files in cppcheck

Cppcheck isn't designed to check header files, stand-alone. Daniel
Marjamäki suggested using --suppress options to avoid FPs.

* Fix Vint complaint in cppcheck handler.

* Fix file path in cppcheck handler

Co-authored-by: Dan George <dgeorge@anduril.com>

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