[llvm] [SDPatternMatch] Do not use std::forward and rvalue references (NFC) (PR #93806)

[Min-Yih Hsu via llvm-commits]

https://github.com/mshockwave approved this pull request.

LGTM.
Yeah I also realized the sub-pattern template types in `SDPatternMatch::And` and `SDPatternMatch::Or` are kind of off. Thanks for fixing them.

https://github.com/llvm/llvm-project/pull/93806