Collation protocol: stricter validators (#2810)

* guide: declare one para as a collator

* add ParaId to Declare messages and clean up

* fix build

* fix the testerinos

* begin adding keystore to collator-protocol

* remove request_x_ctx

* add core_for_group

* add bump_rotation

* add some more helpers to subsystem-util

* change signing_key API to take ref

* determine current and next para assignments

* disconnect collators who are not on current or next para

* add collator peer count metric

* notes for later

* some fixes

* add data & keystore to test state

* add a test utility for answering runtime API requests

* fix existing collator tests

* add new tests

* remove sc_keystore

* update cargo lock

Co-authored-by: Andronik Ordian <write@reusable.software>

polkadot/node/network/availability-distribution/src/error.rs

@@ -109,13 +109,9 @@ impl From<SubsystemError> for Error {
 
 /// Receive a response from a runtime request and convert errors.
 pub(crate) async fn recv_runtime<V>(
-	r: std::result::Result<
-		oneshot::Receiver<std::result::Result<V, RuntimeApiError>>,
-		UtilError,
-	>,
+	r: oneshot::Receiver<std::result::Result<V, RuntimeApiError>>,
 ) -> std::result::Result<V, Error> {
-	r.map_err(Error::UtilRequest)?
-		.await
+	r.await
 		.map_err(Error::RuntimeRequestCanceled)?
 		.map_err(Error::RuntimeRequest)
 }