ubsan/overflow: Rework integer overflow sanitizer option to turn on everything

Since we're going to approach integer overflow mitigation a type at a
time, we need to enable all of the associated sanitizers, and then opt
into types one at a time.

Rename the existing "signed wrap" sanitizer to just the entire topic area:
"integer wrap". Enable the implicit integer truncation sanitizers, with
required callbacks and tests.

Notably, this requires features (currently) only available in Clang,
so we can depend on the cc-option tests to determine availability
instead of doing version tests.

Link: https://lore.kernel.org/r/20250307041914.937329-1-kees@kernel.org


Signed-off-by: Kees Cook <kees@kernel.org>