[clang] [lld] [llvm] [mlir] [NFC][IWYU] Update Support library with IWYU. (PR #102707)

[Daniil Fukalov via cfe-commits]

dfukalov wrote:

Created other [PR 104484](https://github.com/llvm/llvm-project/pull/104484) with reworked/reduced cleanup.


https://github.com/llvm/llvm-project/pull/102707