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

tests/language/language_kernel.status

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # These tests currently take too long. Remove when they are fixed.
 [ $compiler == dartk || $compiler == dartkp ]
 large_class_declaration_test: SkipSlow  # KernelVM Issue 28312
 
 ###############################################################################
 # Dartk Entries
@@ skipping 98 matching lines @@
 
 # dartk: Shared JIT & Precompilation failures
 [ ($compiler == dartk && $runtime == vm) || ($compiler == dartkp && $runtime == dart_precompiled) ]
 accessor_conflict_export2_test: RuntimeError
 accessor_conflict_export_test: RuntimeError
 accessor_conflict_import2_test: RuntimeError
 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
 cha_deopt3_test: RuntimeError
 closure_type_variable_test: RuntimeError
 closures_initializer_test: RuntimeError
 compile_time_constant12_test: Crash
 compile_time_constant_k_test/01: RuntimeError
 compile_time_constant_k_test/02: RuntimeError
 compile_time_constant_k_test/03: RuntimeError
@@ skipping 176 matching lines @@
 regress_r24720_test: RuntimeError
 regress_28278_test: RuntimeError
 reify_typevar_test: RuntimeError
 script1_negative_test: Fail
 script2_negative_test: Fail
 setter_no_getter_call_test/none: RuntimeError
 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
 type_checks_in_factory_method_test: RuntimeError
 type_parameter_literal_test: RuntimeError
 type_variable_function_type_test: RuntimeError
 vm/type_cast_vm_test: RuntimeError
 vm/type_vm_test: RuntimeError
 
 # dartk: JIT failures
 [ $compiler == dartk && $runtime == vm ]
 const_evaluation_test/01: RuntimeError
 const_locals_test: RuntimeError
 constructor_named_arguments_test/01: Crash  # Dartk Issue 28301
 const_string_test: RuntimeError  # Dartk Issue 28306
 instance_creation_in_function_annotation_test: RuntimeError
 library_env_test/has_no_mirror_support: RuntimeError
 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
 
 # dartk: precompilation failures
 [ $compiler == dartkp && $runtime == dart_precompiled ]
 if_null_assignment_static_test/35: Crash  # Dartk Issue 28302
 string_interpolation7_test: RuntimeError  # Dartk Issue 28306
 
 # dartk: precompilation failures (debug)
 [ $compiler == dartkp && $runtime == dart_precompiled && $mode == debug ]
 constructor_named_arguments_test/01: Crash  # Dartk Issue 28301
 not_enough_positional_arguments_test/05: Crash  # Dartk Issue 28301