VM: [Kernel] Fix remaining issues with kernel-based async/await implementation

tests/language/language_kernel.status

Index: tests/language/language_kernel.status
diff --git a/tests/language/language_kernel.status b/tests/language/language_kernel.status
index 8a88df17ef8b718a8415a16bcccd728c09129621..ed19a116db210d76b13add60cbd17c35e5e4c8fd 100644
--- a/tests/language/language_kernel.status
+++ b/tests/language/language_kernel.status
@@ -117,17 +117,6 @@ accessor_conflict_import_prefixed2_test: RuntimeError
 accessor_conflict_import_prefixed_test: RuntimeError
 accessor_conflict_import_test: RuntimeError
 assertion_test: RuntimeError
-async_await_test: Crash, RuntimeError
-async_star_cancel_and_throw_in_finally_test: RuntimeError
-async_star_cancel_while_paused_test: RuntimeError
-async_star_pause_test: Crash, RuntimeError
-async_star_regression_fisk_test: Timeout
-async_star_stream_take_test: Timeout
-async_star_take_reyield_test: Timeout
-async_star_test: Crash, Timeout
-asyncstar_throw_in_catch_test: Timeout
-asyncstar_yield_test: Timeout
-asyncstar_yieldstar_test: Timeout
 bad_raw_string_negative_test: Fail
 cha_deopt1_test: RuntimeError
 cha_deopt2_test: RuntimeError
@@ -324,7 +313,6 @@ static_setter_get_test/01: RuntimeError
 super_test: RuntimeError
 switch7_negative_test: Fail
 switch_try_catch_test: RuntimeError
-sync_generator3_test/test2: RuntimeError
 try_catch_on_syntax_test/10: MissingRuntimeError
 try_catch_on_syntax_test/11: MissingRuntimeError
 try_finally_regress_25654_test: RuntimeError
@@ -346,8 +334,6 @@ redirecting_factory_reflection_test: RuntimeError
 
 # dartk: JIT failures (debug)
 [ $compiler == dartk && $runtime == vm && $mode == debug ]
-async_star_regression_fisk_test: Crash  # Stack mismatch during expression translation.
-async_star_test: Crash  # Stack mismatch during expression translation.
 not_enough_positional_arguments_test/02: Crash  # Dartk Issue 28301
 not_enough_positional_arguments_test/05: Crash  # Dartk Issue 28301