* Comanion for substrate#11136

Signed-off-by: koushiro <[email protected]>

* revert changes in bridge

Signed-off-by: koushiro <[email protected]>

* Also migrate lease depositors

* bump spec version

* Update runtime/common/src/crowdloan/migration.rs

Co-authored-by: Kian Paimani <[email protected]>

Co-authored-by: Kian Paimani <[email protected]>

* remove stupid check

* here too

* integration tests use offset

* fix slots

* fix auctions

* add auctions benchmark

* fix crowdloan

* remove v0 primitives from polkadot-primitives

* first pass: remove v0

* fix fallout in erasure-coding

* remove v1 primitives, consolidate to v2

* the great import update

* update runtime_api_impl_v1 to v2 as well

* guide: add `Version` request for runtime API

* add version query to runtime API

* reintroduce OldV1SessionInfo in a limited way

* add support for parachain to parachain swap

* enable swaps on kusama

* sanity test in paras_registrar

* express more errors

* finish up tests

* fmt

* make fields pub

* refactor integration tests to use real accounts

* Update Crowdloan Account to FundIndex (#4824)

* update fund account to use index

* fix integration tests

* Update runtime/common/src/crowdloan.rs

* finish parachain swap test

* format

* fix warning

* fix spacing

* fix formatting

* write migrations

* add migration

* fixes

* more fixes to migration

* Update runtime/common/src/crowdloan/mod.rs

Co-authored-by: Zeke Mostov <[email protected]>

* Update runtime/common/src/paras_registrar.rs

* Update migration.rs

* extract swap function

Co-authored-by: Zeke Mostov <[email protected]>