[clang] Sanitizer: Support -fwrapv with -fsanitize=signed-integer-overflow (PR #82432)

[Justin Stitt via cfe-commits]

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@@ -399,6 +399,9 @@ Moved checkers
 Sanitizers
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+- ``-fsanitize=signed-integer-overflow`` now instruments signed arithmetic even
+  when ``-fwrapv`` is enabled. Previously, only division checks were enabled.
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JustinStitt wrote:

Doesn't `-fno-sanitizer-signed-integer-overflow` already work? I did some [testing in godbolt](https://godbolt.org/z/oWdxvzs4P) and I am able to toggle this sanitizer on/off.

https://github.com/llvm/llvm-project/pull/82432