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Description
This PR adds
include-what-you-use
to the CI job running clang-tidy. Like clang-tidy, IWYU runs via CMake integration and only runs on cpp files, not cu files. This should help us shrink binaries and reduce compilation times in cases where headers are being included unnecessarily. The proposed additions should have no practical impact (as long as suitable header guards are in place) since the files must already be included somewhere in the include tree for the code to be compiling successfully.Resolves #581.
Checklist