deps: V8: cherry-pick ea996ad04a68

Original commit message:
    [import-attributes] Remove support for numeric keys

    During the 2023-09 TC39 meeting the proposal has been updated to remove support
    for bigint and float literals as import attribute keys, due to implementation
    difficulties in other engines and minimal added value for JS developers.

    GH issue: tc39/proposal-import-attributes#145

    Bug: v8:13856
    Change-Id: I0ede2bb10d6ca338a4b0870a1261ccbcd088c16f
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4899760
    Reviewed-by: Shu-yu Guo <syg@chromium.org>
    Commit-Queue: Joyee Cheung <joyee@igalia.com>
    Cr-Commit-Position: refs/heads/main@{#90318}

Refs: v8/v8@ea996ad
PR-URL: #51136
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>

deps/v8/src/parsing/parser.cc

@@ -1378,16 +1378,8 @@ ImportAssertions* Parser::ParseImportAssertClause() {
   Expect(Token::LBRACE);
 
   while (peek() != Token::RBRACE) {
-    const AstRawString* attribute_key = nullptr;
-    if (Check(Token::STRING) || Check(Token::SMI)) {
-      attribute_key = GetSymbol();
-    } else if (Check(Token::NUMBER)) {
-      attribute_key = GetNumberAsSymbol();
-    } else if (Check(Token::BIGINT)) {
-      attribute_key = GetBigIntAsSymbol();
-    } else {
-      attribute_key = ParsePropertyName();
-    }
+    const AstRawString* attribute_key =
+        Check(Token::STRING) ? GetSymbol() : ParsePropertyName();
 
     Scanner::Location location = scanner()->location();