[llvm] [TableGen][RISCV] Use getAllDerivedDefinitionsIfDefined in RISCVTargetDefEmitter (PR #91941)

[Luke Lau via llvm-commits]

https://github.com/lukel97 commented:

I'm not familiar with RISCVTargetDefEmitter.cpp, but makes sense to me. I presume this is so we can test extensions/profiles/CPUs independently?

https://github.com/llvm/llvm-project/pull/91941