[CSKY] Add compressed instruction mapping between 32-bit and 16-bit instruction

Add all CompressPat to map instructions between 16-bit and 32-bit with using the CompressInstEmitter infra.
Although it's only used in asm printer, also enable it in asm parser to debug mapping when -enable-csky-asm-compressed-inst is on.

Differential Revision: https://reviews.llvm.org/D115026