CI: Disable runtime upgrade spec name check on Westend Asset Hub and …

…fix Staking pallet migration (paritytech#2447)

Westend Asset Hub currently failing because the spec name is being
changed next runtime upgrade
(https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4413125).

This also fixes an idempotency issue with a staking pallet migration.
Similar issues will be caught automatically now that we've also updated
to try-runtime-cli v0.5.0 which checks for idempotency issues.

This also enables try-state checks running in the CI.

substrate/frame/staking/src/migrations.rs

@@ -81,20 +81,10 @@ pub mod v14 {
 			}
 		}
 
-		#[cfg(feature = "try-runtime")]
-		fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError> {
-			frame_support::ensure!(
-				Pallet::<T>::on_chain_storage_version() == 13,
-				"Required v13 before upgrading to v14."
-			);
-
-			Ok(Default::default())
-		}
-
 		#[cfg(feature = "try-runtime")]
 		fn post_upgrade(_state: Vec<u8>) -> Result<(), TryRuntimeError> {
 			frame_support::ensure!(
-				Pallet::<T>::on_chain_storage_version() == 14,
+				Pallet::<T>::on_chain_storage_version() >= 14,
 				"v14 not applied"
 			);
 			Ok(())