Auto merge of #100720 - camsteffen:representable, r=cjgillot

Rewrite representability

 * Improve placement of `Box` in the suggestion
 * Multiple items in a cycle emit 1 error instead of an error for each item in the cycle
 * Introduce `representability` query to avoid traversing an item every time it is used.
 * Also introduce `params_in_repr` query to avoid traversing generic items every time it is used.

Author: bors

Cargo.lock

@@ -3552,7 +3552,6 @@ dependencies = [
  "rustc_span",
  "rustc_target",
  "rustc_trait_selection",
- "rustc_ty_utils",
  "rustc_type_ir",
  "smallvec",
  "tracing",

compiler/rustc_hir_analysis/Cargo.toml

@@ -26,7 +26,6 @@ rustc_span = { path = "../rustc_span" }
 rustc_index = { path = "../rustc_index" }
 rustc_infer = { path = "../rustc_infer" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
-rustc_ty_utils = { path = "../rustc_ty_utils" }
 rustc_lint = { path = "../rustc_lint" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_type_ir = { path = "../rustc_type_ir" }