inlines contains in bitflags!

Closes #17210
Separate static item recursion check into its own pass

This new pass is run before type checking so that recursive items
are detected beforehand.  This prevents going into an infinite
recursion during type checking when a recursive item is used in
an array type.

As a bonus, use `span_err` instead of `span_fatal` so multiple
errors can be reported.

Closes issue #17252
Add regression test for issue #17252
auto merge of #17254 : gamazeps/rust/issue17210, r=alexcrichton

Closes #17210
auto merge of #17264 : bkoropoff/rust/issue-17252, r=nick29581

Recursive items are currently detected in the `check_const` pass which runs after type checking.  This means a recursive static item used as an array length will cause type checking to blow the stack.  This PR separates the recursion check out into a separate pass which is run before type checking.

Closes issue #17252

r? @nick29581
syntax: use an index in CodeMap instead of Gc for ExpnInfo.
rustc: fix fallout from removing the use of Gc for ExpnInfo.
Fix fallout in tests from removing the use of Gc in ExpnInfo.