Add Polkadot AH to PET submodule #216
Description
Polkadot dry-runs are already being run, which means PET can be then be run on top of the post-migration PAH.
After open-web3-stack/polkadot-ecosystem-tests#355, it is now simple to have post-AHM parachains use existing tests with minimal modifications, so this PAH can be added to CI with little effort.