fix(dev-infra): clean up usages within pullapprove tooling (#37338)

Clean up pullapprove tooling to use newly created common utils.
Additionally, use newly created logging levels rather than
verbose flagging.

PR Close #37338

dev-infra/pullapprove/cli.ts

@@ -10,11 +10,8 @@ import {verify} from './verify';
 
 /** Build the parser for the pullapprove commands. */
 export function buildPullapproveParser(localYargs: yargs.Argv) {
-  return localYargs.help()
-      .strict()
-      .option('verbose', {alias: ['v'], description: 'Enable verbose logging'})
-      .demandCommand()
-      .command('verify', 'Verify the pullapprove config', {}, ({verbose}) => verify(verbose));
+  return localYargs.help().strict().demandCommand().command(
+      'verify', 'Verify the pullapprove config', {}, () => verify());
 }
 
 if (require.main === module) {