AArch64 Morello automatic Ghidra processor .inc generation

[RoundofThree]

Developing an automatic generator of processor files for Ghidra will make the process of modifying processor files less error-prone (vs. keeping not-reusable messy patching scripts). And it can make the work of porting other architectures easier.

An idea is to reuse the TableGen of LLVM CHERI repository and refactor the emitter backends to generate Ghidra processor .inc files, similar to llvm-capstone (https://github.com/capstone-engine/llvm-capstone).