[clang] [compiler-rt] [Sanitizer] add signed-integer-wrap sanitizer (PR #80089)

[Nick Desaulniers via cfe-commits]

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+// Check that -fsanitize=signed-integer-wrap instruments with -fwrapv
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nickdesaulniers wrote:

We don't have to use `update_cc_test_checks`; it's nice when we can and when the test has many CHECK lines, but I suspect most of the CHECK lines in this test could be removed without significant loss in signal to noise ratio / coverage intended.

In that case, I'd simply check for the presence (or lack thereof) the calls to the builtins. The CHECKSIO-NOT checks look like what I'm talking about.  The CHECKSIW checks are checking way way more than we really care about.

https://github.com/llvm/llvm-project/pull/80089