Renaming and documentation for ApplyResult, ApplyOutcome and et al (#4134)

* Remove superflous errors from the system module

* Rename and document InclusionOutcome

* Rename InclusionError

* Remove unused inclusion errors.

I left the enumeration though since other elements might be used some day.

* Rename and document DispatchOutcome

* Apply suggestions from code review

Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* TransactionValidityError instead of InclusionError

* Rename InclusionOutcome to ApplyExtrinsicResult

* Update docs.

* Update lib.rs

should be → is

* Bump the block builder API version.

* Fix the should_return_runtime_version test

* Clean the evidence

substrate/primitives/sr-primitives/src/testing.rs

@@ -25,7 +25,7 @@ use crate::traits::{
 };
 #[allow(deprecated)]
 use crate::traits::ValidateUnsigned;
-use crate::{generic, KeyTypeId, ApplyResult};
+use crate::{generic, KeyTypeId, ApplyExtrinsicResult};
 pub use primitives::{H256, sr25519};
 use primitives::{crypto::{CryptoType, Dummy, key_types, Public}, U256};
 use crate::transaction_validity::{TransactionValidity, TransactionValidityError};
@@ -354,7 +354,7 @@ impl<Origin, Call, Extra, Info> Applyable for TestXt<Call, Extra> where
 		self,
 		info: Self::DispatchInfo,
 		len: usize,
-	) -> ApplyResult {
+	) -> ApplyExtrinsicResult {
 		let maybe_who = if let Some((who, extra)) = self.0 {
 			Extra::pre_dispatch(extra, &who, &self.1, info, len)?;
 			Some(who)