feat(dev-infra): add support for new global approvers in pullapprove (#36324)

Pullapprove as added a few new features to allow for us to better
execute our expectation for global approvals. We need to allow for
an expectation that our global approver groups are not in the list
of approved groups. Additionally, since approval groups apply to
all files in the repo, the global approval groups also do not have
conditions defined for them, which means pullapprove verification
need to allow for no conditions need to be defined.

PR Close #36324

dev-infra/pullapprove/group.ts

@@ -34,6 +34,7 @@ const CONDITION_TYPES = {
   INCLUDE_GLOBS: /^contains_any_globs/,
   EXCLUDE_GLOBS: /^not contains_any_globs/,
   ATTR_LENGTH: /^len\(.*\)/,
+  GLOBAL_APPROVAL: /^global-(docs-)?approvers not in groups.approved$/,
 };
 
 /** A PullApprove group to be able to test files against. */
@@ -48,6 +49,7 @@ export class PullApproveGroup {
   public hasMatchers = false;
 
   constructor(public groupName: string, group: PullApproveGroupConfig) {
+    if (group.conditions) {
       for (let condition of group.conditions) {
         condition = condition.trim();
 
@@ -71,6 +73,8 @@ export class PullApproveGroup {
           this.hasMatchers = true;
         } else if (condition.match(CONDITION_TYPES.ATTR_LENGTH)) {
           // Currently a noop as we do not take any action on this condition type.
+        } else if (condition.match(CONDITION_TYPES.GLOBAL_APPROVAL)) {
+          // Currently a noop as we don't take any action for global approval conditions.
         } else {
           const errMessage =
               `Unrecognized condition found, unable to parse the following condition: \n\n` +
@@ -88,6 +92,7 @@ export class PullApproveGroup {
         }
       }
     }
+  }
 
   /** Retrieve all of the lines which were not able to be parsed. */
   getBadLines(): string[] { return this.misconfiguredLines; }

dev-infra/pullapprove/parse-yaml.ts

@@ -8,9 +8,11 @@
 import {parse as parseYaml} from 'yaml';
 
 export interface PullApproveGroupConfig {
-  conditions: string;
+  conditions?: string;
   reviewers: {
     users: string[],
+    teams?: string[],
+  }|{
     teams: string[],
   };
 }