[llvm] [TableGen] Sort matchables depending on predicates. (PR #84483)

[Alfie Richards via llvm-commits]

AlfieRichardsArm wrote:

@atanasyan I see you are a contributor to the MIPS backend. This changes the encodings of 2 test cases for MIPS as a different encoding is chosen. Is this okay?

https://github.com/llvm/llvm-project/pull/84483