refactor: raise AwaitNotInAsyncContext when an AwaitExpression will be parsed (#12716)

* refactor: raise AwaitNotInAsyncContext when an AwaitExpression will be parsed

* tweak logic

* early exit when errors are before thrown error position

* fix: always return true in assert.throws callback

See https://nodejs.org/api/assert.html#assert_assert_throws_fn_error_message

* update test fixtures

* fix flow error

packages/babel-parser/src/tokenizer/state.js

@@ -6,6 +6,7 @@ import { Position } from "../util/location";
 
 import { types as ct, type TokContext } from "./context";
 import { types as tt, type TokenType } from "./types";
+import type { ParsingError } from "../parser/error";
 
 type TopicContextState = {
   // When a topic binding has been currently established,
@@ -37,7 +38,7 @@ export default class State {
     this.startLoc = this.endLoc = this.curPosition();
   }
 
-  errors: SyntaxError[] = [];
+  errors: ParsingError[] = [];
 
   // Used to signify the start of a potential arrow function
   potentialArrowAt: number = -1;
@@ -155,9 +156,6 @@ export default class State {
   // Tokens length in token store
   tokensLength: number = 0;
 
-  // Positions of invalid await errors
-  invalidAwaitErrors: Set<number> = new Set();
-
   curPosition(): Position {
     return new Position(this.curLine, this.pos - this.lineStart);
   }