[parser] Disallow static fields named constructor (#10461)

* Disallow static fields named `constructor` in a class

    - Disallowed static fields named `constructor` in a class (previously only non-static were disallowed)
    - Updated the text for the error for one consolidated warning, for both static and non-static fields
    - Added a test
    - Updated an existing test in the `flow` test suite of the parser to reflect the parse error.
  Strangely, the test used to pass and started failing when inlining the `isNonstaticConstructor` method, without any changes.
  In that test, `constructor` was a field, so in theory it should never have passed.
  Would appreciate some feedback on this, as I'm not 100% sure if this is somehow related to Flow

* Update test262 whitelist

* Add comment and fix && operator

packages/babel-parser/src/parser/statement.js

@@ -1498,13 +1498,18 @@ export default class StatementParser extends ExpressionParser {
   }
 
   pushClassProperty(classBody: N.ClassBody, prop: N.ClassProperty) {
-    // This only affects properties, not methods.
-    if (this.isNonstaticConstructor(prop)) {
+    if (
+      !prop.computed &&
+      (prop.key.name === "constructor" || prop.key.value === "constructor")
+    ) {
+      // Non-computed field, which is either an identifier named "constructor"
+      // or a string literal named "constructor"
       this.raise(
         prop.key.start,
-        "Classes may not have a non-static field named 'constructor'",
+        "Classes may not have a field named 'constructor'",
       );
     }
+
     classBody.body.push(this.parseClassProperty(prop));
   }