Auto merge of #118841 - compiler-errors:always-copy, r=jackh726

Make most `rustc_type_ir` kinds `Copy` by default

1. There's no reason why `TyKind` and `ConstKind`/`ConstData` can't be `Copy`. This allows us to avoid needing a typed arena for the two types.
2. Simplify some impls into derives.
This commit is contained in:
bors 2023-12-12 12:32:32 +00:00
commit 079cf28aca

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