[co19] Roll co19 to 9b05eab312a0247b890c06a05ef667e56a4534ff

2025-01-29 [email protected] dart-lang/co19#3054. Add covariant parameters tests (dart-lang/co19#3059)
2025-01-29 [email protected] dart-lang/co19#3054. Existing tests renamed to Instance Method Closurization (dart-lang/co19#3058)
2025-01-27 [email protected] dart-lang/co19#2162. Add static member and non-redirecting factory constructor conflict test (dart-lang/co19#3056)
2025-01-27 [email protected] dart-lang/co19#2145. Update existing "Evaluation of Implicit Variable Getters" tests (dart-lang/co19#3052)
2025-01-24 [email protected] dart-lang/co19#2138. Add more tests for `call` method/getter (dart-lang/co19#3053)
2025-01-24 [email protected] dart-lang/co19#2162. Add more constructor vs. static member conflict tests (dart-lang/co19#3055)
2025-01-17 [email protected] dart-lang/co19#2976. Add more tests for nullable and FutureOr types (dart-lang/co19#3050)

Cq-Include-Trybots: luci.dart.try:analyzer-linux-release-try
Change-Id: Ibeafe23be5d8b913db4e83b23f3820cafc3802ac
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/406940
Reviewed-by: Erik Ernst <[email protected]>
Reviewed-by: Alexander Thomas <[email protected]>

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": "e1fd1cf868e6fb778c426058737ad0c02122df33",
+  "co19_rev": "9b05eab312a0247b890c06a05ef667e56a4534ff",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "3bd6bc6d207dfb7cf687537e819863cf9a8f2470",