iwyu is short for "include what you use". this workflow is added to
identify missing "#include" and extraneous "#include" in C++ source
files.
This workflow is triggered when a pull request is created targetting
the "master" branch. It uses the clang-include-cleaner tool provided
by clang-tools package to analyze all the ".cc" and ".hh" source files.
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Closesscylladb/scylladb#18122