feat(dev-infra): handle excluding files via globs in pullapprove (#36162)

Updates the pullapprove verification script to handle
cases of excluding globs from groups.

PR Close #36162

dev-infra/pullapprove/parse-yaml.ts

@@ -0,0 +1,33 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import {parse as parseYaml} from 'yaml';
+
+export interface PullApproveGroupConfig {
+  conditions: string;
+  reviewers: {
+    users: string[],
+    teams: string[],
+  };
+}
+
+export interface PullApproveConfig {
+  version: number;
+  github_api_version?: string;
+  pullapprove_conditions?: {
+    condition: string,
+    unmet_status: string,
+    explanation: string,
+  }[];
+  groups: {
+    [key: string]: PullApproveGroupConfig,
+  };
+}
+
+export function parsePullApproveYaml(rawYaml: string): PullApproveConfig {
+  return parseYaml(rawYaml) as PullApproveConfig;
+}