[llvm] [TableGen][DecoderEmitter] Repurpose Filter class (PR #155065)

[Dmitry Vasilyev via llvm-commits]

slydiman wrote:

> I noticed that between the greed and the red states there was one commit ([f5e687d](https://github.com/llvm/llvm-project/commit/f5e687d7bf49cd9fe38ba7acdeb52d4f30468dee)) that for some reason is not listed on the Changes page. Could this commit be related?

You are right. The problem is #154686. Thanks.

https://github.com/llvm/llvm-project/pull/155065