[clang-tools-extra] [clang-tidy][NFC] Add misc-include-cleaner to clang-tidy codebase (PR #171903)

[Carlos Galvez via cfe-commits]

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@@ -42,3 +43,5 @@ Checks: >
 CheckOptions:
   - key:             performance-move-const-arg.CheckTriviallyCopyableMove
     value:           false
+  - key:             misc-include-cleaner.MissingIncludes
+    value:           false
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carlosgalvezp wrote:

The real IWYU does support this policy, but I guess it's not trivial to integrate here...

https://github.com/llvm/llvm-project/pull/171903