[co19] Roll co19 to 8738630ac89dd2433b5be27157ae607ce46a7e9a

2024-06-07 [email protected] Fixes dart-lang/co19#2704. Fix typo in LanguageFeatures/Wildcards/initializing_formals_A01_t01 (dart-lang/co19#2705)
2024-06-07 [email protected] Fixes dart-lang/co19#2702. Fix parameter name in co19/Language/Functions/Formal_Parameters/Optional_Formals/name_t01 (dart-lang/co19#2703)
2024-06-06 [email protected] Fixed dart-lang/co19#2698. Update tests to check a setter (dart-lang/co19#2699)
2024-06-01 49699333+dependabot[bot]@users.noreply.github.com Bump actions/checkout from 4.1.4 to 4.1.6 in the github-actions group (dart-lang/co19#2695)
2024-05-31 [email protected] dart-lang/co19#2641. Add initializing formals tests (dart-lang/co19#2686)

Change-Id: I3f2ca2583ac8d4bf1d4f4c5055895c48fe4824e3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370241
Reviewed-by: Chloe Stefantsova <[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": "0a9f7daccd0e682ab791f04ecc23f1dbcee04977",
+  "co19_rev": "8738630ac89dd2433b5be27157ae607ce46a7e9a",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "a7c23b2422492dcc515d1ba4abe3609b50e2a139",