[asan][test] Re-generate asan-check-memaccess-add.ll with update_llc_test_checks.py

* LABEL is important to give a better diagnostic in case a check pattern fails
* Some NOT negative patterns are not effective. NEXT is useful to ensure
  a code sequence has the desired instructions and report a better
  diagnostic if something goes off.
* Since the ABI says the first parameter is in RDI. Replacing the
  pattern `[[REG16:.*]]` with `RDI` should not cause maintenance burden.

Since the test is pretty mechanical, just use update_llc_test_checks.py
to re-generate it. Most functions can use `nounwind` to avoid CFI
directives.

Reviewed By: kstoimenov, vitalybuka

Differential Revision: https://reviews.llvm.org/D118864