Move utils from rustc_middle to rustc_ty_utils

Author: camsteffen

Cargo.lock

@@ -3781,8 +3781,6 @@ dependencies = [
  "either",
  "gsgdt",
  "polonius-engine",
- "rand 0.8.5",
- "rand_xoshiro",
  "rustc-rayon",
  "rustc-rayon-core",
  "rustc_apfloat",
@@ -4228,6 +4226,8 @@ dependencies = [
 name = "rustc_ty_utils"
 version = "0.0.0"
 dependencies = [
+ "rand 0.8.5",
+ "rand_xoshiro",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_hir",

compiler/rustc_middle/Cargo.toml

@@ -12,8 +12,6 @@ chalk-ir = "0.80.0"
 either = "1.5.0"
 gsgdt = "0.1.2"
 polonius-engine = "0.13.0"
-rand = "0.8.4"
-rand_xoshiro = "0.6.0"
 rustc_apfloat = { path = "../rustc_apfloat" }
 rustc_arena = { path = "../rustc_arena" }
 rustc_ast = { path = "../rustc_ast" }