[co19] Roll co19 to 6ff5ec332b9c1b9bcbca9f47758ec11469f5b91f

2025-04-16 [email protected] dart-lang/co19#3057. Add more try-catch(-finally) tests (dart-lang/co19#3149)
2025-04-16 [email protected] dart-lang/co19#3057. Add more flow analysis tests for try-catch and try-finally (dart-lang/co19#3142)
2025-04-15 [email protected] Fixes dart-lang/co19#3143. Update assertions, add language version, add new tests (dart-lang/co19#3144)

Cq-Include-Trybots: luci.dart.try:analyzer-linux-release-try
Change-Id: Id1491e304f02d580a42d1c3d9831b96eaca52fc6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423280
Commit-Queue: Erik Ernst <[email protected]>
Reviewed-by: Alexander Thomas <[email protected]>
Reviewed-by: Erik Ernst <[email protected]>

Author: sgrekhov

DEPS

@@ -54,7 +54,7 @@ vars = {
 
   # co19 is a cipd package automatically generated for each co19 commit.
   # Use tests/co19/update.sh to update this hash.
-  "co19_rev": "4ebc13c27af77129889a11fd1f95cff04dccd8f9",
+  "co19_rev": "6ff5ec332b9c1b9bcbca9f47758ec11469f5b91f",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "1fa5d33a45f7d4dd0093124706cdfa45d9270851",