[clang] [Clang] Overflow Pattern Exclusion - rename some patterns, enhance docs (PR #105709)

[Justin Stitt via cfe-commits]

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@@ -4806,6 +4806,34 @@ getOverflowPatternBinOp(const BinaryOperator *E) {
   return {};
 }
 
+/// Compute and set the OverflowPatternExclusion bit based on whether the
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JustinStitt wrote:

I wanted to avoid calling `getOverflowPatternBinOp()` as it is more expensive than just checking if the flags are enabled or not.

https://github.com/llvm/llvm-project/pull/105709