[llvm] [lld] [RISCV] Support printing immediate of RISCV MCInst in hexadecimal format (PR #74053)

[Fangrui Song via llvm-commits]

MaskRay wrote:

When merging a change, especially with a lot of test updates, always ensure that the rebased version still works...


Sometimes, only through rebasing can one notice that the patch [needs adjustments to more code or tests](https://maskray.me/blog/2023-09-09-reflections-on-llvm-switch-to-github-pull-requests#patch-evolution) due to its interaction with another landed patch:

Another landed patch added some tests that would be changed by the current patch.
Another landed patch added a new use of the function that is renamed by the current patch.

--

You can rebase locally and test, but not push an amended commit to the branch, then use the github to merge.

https://github.com/llvm/llvm-project/pull/74053