[llvm] [NVPTX] Enable i128 support in the NVPTX backend (PR #98658)

[Artem Belevich via llvm-commits]

================
@@ -0,0 +1,643 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
----------------
Artem-B wrote:

I assume that what we're testing for here is the lack of libcalls, not the particular sequence of instructions we generate for i128 divisions. If that's the case then a negative check verifying absence of calls may be a more suitable approach.

https://github.com/llvm/llvm-project/pull/98658