Support executing a function across all targets of a binding

[OlafConijn]

would be great to support executing a typescript function across all targets of a binding:

const moreComplexBinding: IOrganizationBinding = { 
  Region: ['us-east-1', 'us-west-1'], 
  IncludeMasterAccount: true, 
  Account: '*', 
  ExcludeAccount: [ { Ref: 'AccountB' } ] 
};

await orgClient.performFunction( async credentials => {
 //credentials can be used to
 const s3client = new S3({credentials}); // <-- create an s3 client in all accounts
});

might make sense to support setting concurrent executions & failure tolerance. much like the cli alows you.

concrete use-cases include any out of band stuff like ad hoc checking for failed stacks or tweaking resources