AstGen: introduce `try` instruction

This introduces two ZIR instructions:
 * `try`
 * `try_inline`

This is part of an effort to implement #11772.
0224ad19b8Andrew Kelley committed on 6/5/2022, 8:37:08 AM· committed by Jakub Konkaparent33826a6
4 files changedLine totals unavailable