[co19] Roll co19 to abef8c3392aeb04a59e94a467d9b08f16401852f

2024-10-29 [email protected] Fixes dart-lang/co19#2954. Don't expect null-aware warnings in CFE (dart-lang/co19#2955)
2024-10-28 [email protected] Fixes dart-lang/co19#2947. Expect AUGMENTATION_OF_DIFFERENT_DECLARATION_KIND in augmenting_types_A02_t14_lib.dart (dart-lang/co19#2952)
2024-10-25 [email protected] Fixes dart-lang/co19#2933. Add one more Stream.multi test (dart-lang/co19#2948)
2024-10-25 [email protected] Fixes dart-lang/co19#2950. Fix run-time errors in null-aware elements tests (dart-lang/co19#2951)
2024-10-25 [email protected] Fixes dart-lang/co19#2386. Add more super-bounded types tests (dart-lang/co19#2949)
2024-10-25 [email protected] Fixes dart-lang/co19#2945. Fix invalid_null_aware_operator in null-aware elements tests (dart-lang/co19#2946)
2024-10-25 [email protected] dart-lang/co19#2933. Add MultiStreamController tests. Part 4. (dart-lang/co19#2941)

Cq-Include-Trybots: luci.dart.try:analyzer-linux-release-try
Change-Id: I77f4faaa3ad785c9c43bf47807fcf9b355edaa5e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/392906
Commit-Queue: Chloe Stefantsova <[email protected]>
Reviewed-by: Erik Ernst <[email protected]>
Reviewed-by: Chloe Stefantsova <[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": "5582f300f30244ffd6e363761315d400cc37a023",
+  "co19_rev": "abef8c3392aeb04a59e94a467d9b08f16401852f",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "3bd6bc6d207dfb7cf687537e819863cf9a8f2470",