[clang] [lldb] [llvm] [APInt] Fix APInt constructions where value does not fit bitwidth (NFCI) (PR #80309)

[Yingwei Zheng via cfe-commits]

https://github.com/dtcxzyw commented:

Middle-end/CodeGen/RISC-V changes LGTM.

https://github.com/llvm/llvm-project/pull/80309