[llvm] Add and call `AMDGPUMCResourceInfo::reset` method (PR #110818)

[Thomas Symalla via llvm-commits]

tsymalla wrote:

> Why not wrap it into an `std::optional`?

It would work, but I didn't want to introduce another way of defining members to the AsmPrinter :-)

https://github.com/llvm/llvm-project/pull/110818