Rollup merge of #67642 - Mark-Simulacrum:relax-bounds, r=Amanieu

Rollup merge of #67642 - Mark-Simulacrum:relax-bounds, r=Amanieu

Relax bounds on HashMap/HashSet

These APIs changed from the old bound listed to the new bound (possibly empty):

K: Hash + Eq -> K
* new
* with_capacity

K: Eq + Hash, S: BuildHasher -> K, S
* with_hasher
* with_capacity_and_hasher
* hasher

K: Eq + Hash + Debug -> K: Debug
S: BuildHasher -> S
HashMap as Debug

K: Eq + Hash -> K
S: BuildHasher + Default -> S: Default
HashMap as Default

Resolves #44777.