[parser] Lift template literal invalid escape restriction

test/test262/test262.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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@@ skipping 378 matching lines @@
   'annexB/language/eval-code/direct/func-block-decl-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-decl-a-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-decl-b-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-else-stmt-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-if-decl-no-else-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-if-stmt-else-decl-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-switch-case-eval-func-no-skip-try': [FAIL],
   'annexB/language/eval-code/direct/func-switch-dflt-eval-func-no-skip-try': [FAIL],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=5546
-  'language/expressions/tagged-template/invalid-escape-sequences': [FAIL],
+  'language/expressions/tagged-template/invalid-escape-sequences': ['--harmony-template-escapes'],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=5537
   'built-ins/global/*': [SKIP],
 
   # PreParser doesn't produce early errors
   # https://bugs.chromium.org/p/v8/issues/detail?id=2728
   'language/expressions/async-arrow-function/early-errors-arrow-formals-body-duplicate': [FAIL],
   'language/expressions/object/method-definition/generator-param-redecl-const': [FAIL],
   'language/expressions/object/method-definition/generator-param-redecl-let': [FAIL],
   'language/expressions/object/method-definition/name-param-redecl': [FAIL],
@@ skipping 282 matching lines @@
 
 ['variant == asm_wasm', {
   '*': [SKIP],
 }],  # variant == asm_wasm
 
 ['variant == wasm_traps', {
   '*': [SKIP],
 }],  # variant == wasm_traps
 
 ]