Backport import path fix (#624)

This is a backport of #620 requested by @cduck . 

Mitigates the need to have `lark` installed just to have access to the
pass!

Co-authored-by: Casey Duckering <[email protected]>

Author: johnzl-777

src/bloqade/stim/passes/flatten.py

@@ -5,7 +5,7 @@
 from kirin.passes import Pass
 from kirin.rewrite.abc import RewriteResult
 
-from bloqade.qasm2.passes.fold import AggressiveUnroll
+from bloqade.rewrite.passes import AggressiveUnroll
 from bloqade.stim.passes.simplify_ifs import StimSimplifyIfs