Normalize all opaque types when converting ParamEnv to Reveal::All

[Aaron1011]

When we normalize a type using a ParamEnv with a reveal mode of
RevealMode::All, we will normalize opaque types to their underlying
types (e.g. type MyOpaque = impl Foo -> StructThatImplsFoo).
However, the ParamEnv may still have predicates referring to the
un-normalized opaque type (e.g. <T as MyTrait<MyOpaque>>). This can
cause trait projection to fail, since a type containing normalized
opaque types will not match up with the un-normalized type in the
ParamEnv.

To fix this, we now explicitly normalize all opaque types in
caller_bounds of a ParamEnv when changing its mode to
RevealMode::All. This ensures that all predicatse will refer to the
underlying types of any opaque types involved, allowing them to be
matched up properly during projection. To reflect the fact that
normalization is occuring, ParamEnv::with_reveal_all is renamed to
ParamEnv::with_reveal_all_normalized

Fixes #65918