[llvm] [JITLink][AArch32] Add TableGen Backend for Instr Encodings (PR #76996)

[Eymen Ünay via llvm-commits]

eymay wrote:

The current state is not very clean with the build system. I would appreciate any comment on including the generated file into the header file itself. Though being a temporary solution, you can find the generated file at `llvm/unittests/ExecutionEngine/JITLink/JITLinkAArch32.inc`.

https://github.com/llvm/llvm-project/pull/76996