Rename Statemint to Asset Hub (#2633)

* change dir names

* cargo toml updates

* fix crate imports for build

* change chain spec names and PR review rule

* update cli to accept asset-hub

* find/replace benchmark commands

* integration tests

* bridges docs

* more integration tests

* AuraId

* other statemint tidying

* rename statemint mod

* chain spec mod

* rename e2e test dirs

* one more Runtime::Statemine

* benchmark westmint

* rename chain spec name and id

* rename chain spec files

* more tidying in scripts/docs/tests

* rename old dir if exists

* Force people to manually do the move.

(Safer as there could be additional considerations with their setup)

* review touchups

* more renaming

* Update polkadot-parachain/src/command.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* better error message

* do not break on-chain spec_name

* log info message that path has been renamed

* better penpal docs

---------

Co-authored-by: gilescope <gilescope@gmail.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: parity-processbot <>

cumulus/bridges/modules/messages/README.md

@@ -33,8 +33,8 @@ is the runtime developer who defines what message lane and message mean for this
 
 In our [Kusama<>Polkadot bridge](../../docs/polkadot-kusama-bridge-overview.md) we are using lane
 as a channel of communication between two parachains of different relay chains. For example, lane
-`[0, 0, 0, 0]` is used for Statemint <> Statemine communications. Other lanes may be used to bridge
-another parachains.
+`[0, 0, 0, 0]` is used for Polkadot <> Kusama Asset Hub communications. Other lanes may be used to
+bridge other parachains.
 
 ## Message Workflow