Log Message:
include-what-you-use: updated to 0.22

0.22
Compatible with Clang 18.

Major changes:

[iwyu] Improve type analysis for typedefs, aliases and templates
[iwyu] Improve analysis of macros expanding macros
[iwyu] Improve IWYU driver for better validation and job handling
[iwyu] Reject IWYU invocations with precompiled headers (see FAQ)
[iwyu_tool] Better preserve failure exit codes
[mappings] Add mappings for libstdc++ <debug/...> headers
[mappings] Make mappings for POSIX and standard C headers stricter (more portable)
[doc] Add separate FAQ page for longer descriptions
[ci] IWYU now runs on itself in CI (finally!)