UMP: Support Overweight messages (#3575)

* Introduce new config: ump_max_individual_weight

* Implement overweight msg stashing

* Test

* Add migration module.

Also introduces a test for migration

* Integrate ExecuteOverweightOrigin to runtimes

* Fix more stuff

* Add `yeet` into dictionary

* Use suggested `Error` variant names

* typo

* Use 20ms as the maximum individual message weight

* Update the test value

* rustfmt

* Clean up

* Remove deprecated field from host config

* Remove missed _hrmp_open_request_ttl

* Apply typo fix suggestion

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

* Rename `migration::migrate_to_latest`

* Restore `_hrmp_open_request_ttl` in `v0::HostConfiguration`

* Apply suggestion for a rustdoc

* Apply the suggestion

* Test v0 config with the raw production data fetched from Kusama

* Update runtime/parachains/src/ump.rs

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

* Expose migration functions

* Fix spellcheck

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

polkadot/xcm/xcm-simulator/example/src/relay_chain.rs

@@ -166,6 +166,7 @@ impl ump::Config for Runtime {
 	type Event = Event;
 	type UmpSink = ump::XcmSink<XcmExecutor<XcmConfig>, Runtime>;
 	type FirstMessageFactorPercent = FirstMessageFactorPercent;
+	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;
 }
 
 impl origin::Config for Runtime {}