add integration test for receiving TEER from AH

[brenzi]

We had to hot-fix broken weights here:
64f3098

This weight::MAX caused an obscure error when receiving TEER from asset hub:

                 xcm::weight  TRACE: [37] WeightInfoBounds message=Xcm([ReceiveTeleportedAsset(Assets([Asset { id: AssetId(Location { parents: 0, interior: Here }), fun: Fungible(500000000000) }])), ClearOrigin, BuyExecution { fees: Asset { id: AssetId(Location { parents: 0, interior: Here }), fun: Fungible(500000000000) }, weight_limit: Unlimited }, DepositAsset { assets: Wild(AllCounted(1)), beneficiary: Location { parents: 0, interior: X1([AccountId32 { network: None, id: [200, 85, 138, 130, 159, 226, 249, 114, 102, 140, 251, 48, 87, 210, 15, 209, 34, 158, 12, 139, 238, 222, 252, 244, 104, 235, 77, 133, 246, 93, 72, 60] }]) } }, SetTopic([219, 93, 169, 114, 24, 198, 55, 175, 172, 169, 218, 182, 75, 243, 43, 251, 174, 126, 35, 101, 233, 66, 46, 255, 112, 67, 92, 18, 153, 108, 13, 162])])
        xcm::process-message  TRACE: [37] Failed to prepare message.