[E0573] Something other than type was used

[MahadMuhammad]

Expected Type got something else - E0573

• Added last variant name, errorcode & rich location. for enum candidates.
• Improved by this issue ICE - Expected Type got something else #2479

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Testcases:

• gcc/testsuite/rust/compile/issue-2479.rs

test.rs:7:26: error: expected type, found variant of ‘Dragon::Born’ [E0573]
    7 | fn oblivion() -> Dragon::Born { // error!
      |                          ^~~~
      |                          not a type
test.rs:7:1: error: failed to resolve return type
    7 | fn oblivion() -> Dragon::Born { // error!
      | ^~
test.rs:20:26: error: expected type, found variant of ‘Wizard::Saruman’ [E0573]
   20 |     fn wizard(_: Wizard::Saruman); // error!
      |                          ^~~~~~~
      |                          not a type

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gcc/rust/ChangeLog:

* typecheck/rust-hir-type-check-type.cc: Added last variant name, errorcode & rich location.

gcc/testsuite/ChangeLog:

* rust/compile/issue-2479.rs: Updated comment.

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