Upgrade to latest polkadot-sdk@1.6 release (#159)

Based on bump to
[`polkadot-sdk@1.5.0`](#137).

Attached result of `cargo upgrade -v --pinned --incompatible`
[cargo-upgrade-version-bump.log](https://github.com/polkadot-fellows/runtimes/files/14044160/cargo-upgrade-version-bump.log)

_Note: Encointer was not upgraded (because its pallet references
`polkadot@1.3.0` release)._

## ~~For reviewers~~

~~This PR is against `polkadot-fellows`'s main to bring it to the
fellows repo, but if you want to see a real diff relevant to the
`polkadot-sdk@1.6.0` update please check:
bkontur/runtimes@bko-bump-to-1.5...bkontur:runtimes:bko-bump-to-1.6.~~


## TODO

- [x] fix compilation
- [x] fix integration tests
- [x] fix benchmarks (also try them) - `collectives-polkadot` `payout`
- [ ] ~~Does not require a CHANGELOG entry~~
- [x] `warning: use of deprecated struct
`staging_xcm_builder::CurrencyAdapter`: Use `FungibleAdapter` instead`
- [ ] search for `TODO:(PR#159) change to FungibleAdapter` and/or wait
for paritytech/polkadot-sdk#3287
- [x] patch for `pallet-nomination-pools` migration fix
paritytech/polkadot-sdk#3093
- will be fixed here
#188 (comment)
- [x] patch for `xcm-executor` fix (for 1.6.0) e.g.
paritytech/polkadot-sdk#3174
- [x] check/fix coretime stuff for Kusama/Polkadot - search for `//
TODO:(PR#159)(PR#1694)` - see
[comment](#159 (comment))
- fixed by bkontur#3
- [x] check the
`MaxControllersInDeprecationBatch`https://github.com/polkadot-fellows/runtimes/pull/159/files#r1492361038
- [x] check `pallet_identity::Config` for Kusama and Polkadot
https://github.com/polkadot-fellows/runtimes/pull/159/files#r1492363866

---------

Signed-off-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Ross Bulat <ross@parity.io>
Co-authored-by: Alain Brenzikofer <alain@integritee.network>
Co-authored-by: eskimor <eskimor@no-such-url.com>
Co-authored-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: fellowship-merge-bot[bot] <151052383+fellowship-merge-bot[bot]@users.noreply.github.com>

.github/workflows/integration-tests-matrix.json

@@ -6,5 +6,13 @@
   {
     "name": "asset-hub-polkadot",
     "package": "asset-hub-polkadot-integration-tests"
+  },
+  {
+    "name": "bridge-hub-kusama",
+    "package": "bridge-hub-kusama-integration-tests"
+  },
+  {
+    "name": "bridge-hub-polkadot",
+    "package": "bridge-hub-polkadot-integration-tests"
   }
 ]

CHANGELOG.md

@@ -13,20 +13,25 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 0022-adopt-encointer-runtime.md) ([polkadot-fellows/runtimes#80](https://github.com/polkadot-fellows/runtimes/pull/80))
 - Feature for enabling debug prints in the Polkadot and Kusama runtime ([polkadot-fellows/runtimes#85](https://github.com/polkadot-fellows/runtimes/pull/85))
 - Added new "Wish for Change" track ([polkadot-fellows/runtimes#184](https://github.com/polkadot-fellows/runtimes/pull/184))
+- Enable Coretime and on-demand on Kusama ([polkadot-fellows/runtimes#159](https://github.com/polkadot-fellows/runtimes/pull/159)
 
 ### Changed
 
 - Upgrade parachains runtime API from v7 to v8 in Kusama ([context](https://paritytech.github.io/polkadot-sdk/book/protocol-validator-disabling.html), [polkadot-fellows/runtimes#148](https://github.com/polkadot-fellows/runtimes/pull/148)).
 - Fixed the lowering of Asset Hub existential deposits.
 - MMR leaves generated by `pallet_mmr` point to the next-authority-set of the current block instead of the prior block [polkadot-fellows/runtimes#169](https://github.com/polkadot-fellows/runtimes/pull/169)
-- Upgrade dependencies to the `polkadot-sdk@1.5.0` release ([polkadot-fellows/runtimes#137](https://github.com/polkadot-fellows/runtimes/pull/137))
 - Deprecate the `xcm::body::TREASURER_INDEX` constant and use the standard `Treasury` variant from the `xcm::BodyId` type instead ([polkadot-fellows/runtimes#149](https://github.com/polkadot-fellows/runtimes/pull/149))
 - Bump parachains runtime API to v9 in Kusama to enable the `node_features` function [polkadot-fellows/runtimes#194](https://github.com/polkadot-fellows/runtimes/pull/194)
 
 ### Removed
 
 - Removed the `SafeCallFilter` from the Relay Chain XCM config ([polkadot-fellows/runtimes#172](https://github.com/polkadot-fellows/runtimes/pull/172)).
 
+### Based on Polkadot-SDK
+
+- Upgrade dependencies to the [polkadot-sdk@1.5.0](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-v1.5.0) release ([polkadot-fellows/runtimes#137](https://github.com/polkadot-fellows/runtimes/pull/137))
+- Upgrade dependencies to the [polkadot-sdk@1.6.0](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-v1.6.0) release ([polkadot-fellows/runtimes#159](https://github.com/polkadot-fellows/runtimes/pull/159))
+
 ## [1.1.1] 25.01.2024
 
 ### Fixed