Handle the require call in javascript file for getSymbolAtLocation

This helps in getting the alias symbol so that it can go to the definition of external module
Fixes #9251

Author: sheetalkamat

src/compiler/checker.ts

@@ -18436,6 +18436,9 @@ namespace ts {
                             (<ImportDeclaration>node.parent).moduleSpecifier === node)) {
                         return resolveExternalModuleName(node, <LiteralExpression>node);
                     }
+                    if (isInJavaScriptFile(node) && isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) {
+                        return resolveExternalModuleName(node, <LiteralExpression>node);
+                    }
                 // Fall through
 
                 case SyntaxKind.NumericLiteral:

tests/cases/fourslash/goToDefinitionJsModuleName.ts

@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts'/>
+
+// @allowJs: true
+// @Filename: foo.js
+/////*2*/module.exports = {};
+
+// @Filename: bar.js
+////var x = require(/*1*/"./foo");
+
+debugger;
+verify.goToDefinition("1", "2");