Moves tests to '--harmony-await-optimization'

Bug: v8:8387
Change-Id: Ifd640603febddd32a778167bbce84e96539ac9c2
Reviewed-on: https://chromium-review.googlesource.com/c/1311373Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57190}

test/test262/test262.status

@@ -623,6 +623,12 @@
   'intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-long': [FAIL],
   'intl402/RelativeTimeFormat/prototype/formatToParts/pl-pl-style-narrow': [FAIL],
 
+  # await tests that require flags
+  'language/expressions/await/async-generator-interleaved': ['--harmony-await-optimization'],
+  'language/expressions/await/await-monkey-patched-promise': ['--harmony-await-optimization'],
+  'language/expressions/await/for-await-of-interleaved': ['--harmony-await-optimization'],
+  'language/expressions/await/async-await-interleaved': ['--harmony-await-optimization'],
+
   ######################## NEEDS INVESTIGATION ###########################
 
   # These test failures are specific to the intl402 suite and need investigation
@@ -651,12 +657,6 @@
   'intl402/NumberFormat/prototype/format/format-fraction-digits-precision': [FAIL],
   'intl402/NumberFormat/prototype/format/format-significant-digits-precision': [FAIL],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=8387
-  'language/expressions/await/async-generator-interleaved': [FAIL],
-  'language/expressions/await/await-monkey-patched-promise': [FAIL],
-  'language/expressions/await/for-await-of-interleaved': [FAIL],
-  'language/expressions/await/async-await-interleaved': [FAIL],
-
   ##################### DELIBERATE INCOMPATIBILITIES #####################
 
   # https://github.com/tc39/ecma262/pull/889