[clang-tools-extra] [clang-tidy] Add portability-avoid-platform-specific-fundamental-types (PR #146970)

[JJ Marr via cfe-commits]

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+.. title:: clang-tidy - portability-avoid-platform-specific-fundamental-types
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+portability-avoid-platform-specific-fundamental-types
+=====================================================
+
+Finds fundamental types (e.g. ``int``, ``float``) and recommends using typedefs
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jj-marr wrote:

Actually I didn't, but fixed.

https://github.com/llvm/llvm-project/pull/146970