Note when a a move/borrow error is caused by a deref coercion

Fixes #73268

When a deref coercion occurs, we may end up with a move error if the
base value has been partially moved out of. However, we do not indicate
anywhere that a deref coercion is occuring, resulting in an error
message with a confusing span.

This PR adds an explicit note to move errors when a deref coercion is
involved. We mention the name of the type that the deref-coercion
resolved to, as well as the `Deref::Target` associated type being used.

compiler/rustc_span/src/symbol.rs

@@ -416,7 +416,9 @@ symbols! {
         deny,
         deprecated,
         deref,
+        deref_method,
         deref_mut,
+        deref_target,
         derive,
         diagnostic,
         direct,