Re-enable running our eslint rules using ts-node (#159495)

Resubmission of #157532 with the following changes:

- Use `eslint-plugin-local` instead of `yarn` link to run our plugins
- Move our plugins to a top level `.eslintplugin` dir (as required by `eslint-plugin-local`)
- Update all names to `local/`

.eslintplugin/code-no-look-behind-regex.ts

@@ -0,0 +1,50 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as eslint from 'eslint';
+import { TSESTree } from '@typescript-eslint/experimental-utils';
+import * as ESTree from 'estree';
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+const _positiveLookBehind = /\(\?<=.+/;
+const _negativeLookBehind = /\(\?<!.+/;
+
+function _containsLookBehind(pattern: string | unknown): boolean {
+	if (typeof pattern !== 'string') {
+		return false;
+	}
+	return _positiveLookBehind.test(pattern) || _negativeLookBehind.test(pattern);
+}
+
+module.exports = {
+
+	create(context: eslint.Rule.RuleContext) {
+		return {
+			// /.../
+			['Literal[regex]']: (node: any) => {
+				type RegexLiteral = TSESTree.Literal & { regex: { pattern: string; flags: string } };
+				const pattern = (<RegexLiteral>node).regex?.pattern;
+				if (_containsLookBehind(pattern)) {
+					context.report({
+						node,
+						message: 'Look behind assertions are not yet supported in all browsers'
+					});
+				}
+			},
+			// new Regex("...")
+			['NewExpression[callee.name="RegExp"] Literal']: (node: ESTree.Literal) => {
+				if (_containsLookBehind(node.value)) {
+					context.report({
+						node,
+						message: 'Look behind assertions are not yet supported in all browsers'
+					});
+				}
+			}
+		};
+	}
+};