Fix spelling mistakes across the whole repository (#3808)

**Update:** Pushed additional changes based on the review comments.

**This pull request fixes various spelling mistakes in this
repository.**

Most of the changes are contained in the first **3** commits:

- `Fix spelling mistakes in comments and docs`

- `Fix spelling mistakes in test names`

- `Fix spelling mistakes in error messages, panic messages, logs and
tracing`

Other source code spelling mistakes are separated into individual
commits for easier reviewing:

- `Fix the spelling of 'authority'`

- `Fix the spelling of 'REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY'`

- `Fix the spelling of 'prev_enqueud_messages'`

- `Fix the spelling of 'endpoint'`

- `Fix the spelling of 'children'`

- `Fix the spelling of 'PenpalSiblingSovereignAccount'`

- `Fix the spelling of 'PenpalSudoAccount'`

- `Fix the spelling of 'insufficient'`

- `Fix the spelling of 'PalletXcmExtrinsicsBenchmark'`

- `Fix the spelling of 'subtracted'`

- `Fix the spelling of 'CandidatePendingAvailability'`

- `Fix the spelling of 'exclusive'`

- `Fix the spelling of 'until'`

- `Fix the spelling of 'discriminator'`

- `Fix the spelling of 'nonexistent'`

- `Fix the spelling of 'subsystem'`

- `Fix the spelling of 'indices'`

- `Fix the spelling of 'committed'`

- `Fix the spelling of 'topology'`

- `Fix the spelling of 'response'`

- `Fix the spelling of 'beneficiary'`

- `Fix the spelling of 'formatted'`

- `Fix the spelling of 'UNKNOWN_PROOF_REQUEST'`

- `Fix the spelling of 'succeeded'`

- `Fix the spelling of 'reopened'`

- `Fix the spelling of 'proposer'`

- `Fix the spelling of 'InstantiationNonce'`

- `Fix the spelling of 'depositor'`

- `Fix the spelling of 'expiration'`

- `Fix the spelling of 'phantom'`

- `Fix the spelling of 'AggregatedKeyValue'`

- `Fix the spelling of 'randomness'`

- `Fix the spelling of 'defendant'`

- `Fix the spelling of 'AquaticMammal'`

- `Fix the spelling of 'transactions'`

- `Fix the spelling of 'PassingTracingSubscriber'`

- `Fix the spelling of 'TxSignaturePayload'`

- `Fix the spelling of 'versioning'`

- `Fix the spelling of 'descendant'`

- `Fix the spelling of 'overridden'`

- `Fix the spelling of 'network'`

Let me know if this structure is adequate.

**Note:** The usage of the words `Merkle`, `Merkelize`, `Merklization`,
`Merkelization`, `Merkleization`, is somewhat inconsistent but I left it
as it is.

~~**Note:** In some places the term `Receival` is used to refer to
message reception, IMO `Reception` is the correct word here, but I left
it as it is.~~

~~**Note:** In some places the term `Overlayed` is used instead of the
more acceptable version `Overlaid` but I also left it as it is.~~

~~**Note:** In some places the term `Applyable` is used instead of the
correct version `Applicable` but I also left it as it is.~~

**Note:** Some usage of British vs American english e.g. `judgement` vs
`judgment`, `initialise` vs `initialize`, `optimise` vs `optimize` etc.
are both present in different places, but I suppose that's
understandable given the number of contributors.

~~**Note:** There is a spelling mistake in `.github/CODEOWNERS` but it
triggers errors in CI when I make changes to it, so I left it as it
is.~~

polkadot/node/subsystem-bench/src/lib/mock/av_store.rs

@@ -39,7 +39,7 @@ pub struct AvailabilityStoreState {
 
 const LOG_TARGET: &str = "subsystem-bench::av-store-mock";
 
-/// Mockup helper. Contains Ccunks and full availability data of all parachain blocks
+/// Mockup helper. Contains Chunks and full availability data of all parachain blocks
 /// used in a test.
 #[derive(Clone)]
 pub struct NetworkAvailabilityState {

polkadot/node/subsystem-bench/src/lib/mock/chain_api.rs

@@ -89,7 +89,7 @@ impl MockChainApi {
 							let hash = self
 								.state
 								.get_header_by_number(requested_number)
-								.expect("Unknow block number")
+								.expect("Unknown block number")
 								.hash();
 							sender.send(Ok(Some(hash))).unwrap();
 						},

polkadot/node/subsystem-bench/src/lib/mock/network_bridge.rs

@@ -42,8 +42,8 @@ pub struct MockNetworkBridgeTx {
 	network: NetworkEmulatorHandle,
 	/// A channel to the network interface,
 	to_network_interface: UnboundedSender<NetworkMessage>,
-	/// Test authorithies
-	test_authorithies: TestAuthorities,
+	/// Test authorities
+	test_authorities: TestAuthorities,
 }
 
 /// A mock of the network bridge tx subsystem.
@@ -58,9 +58,9 @@ impl MockNetworkBridgeTx {
 	pub fn new(
 		network: NetworkEmulatorHandle,
 		to_network_interface: UnboundedSender<NetworkMessage>,
-		test_authorithies: TestAuthorities,
+		test_authorities: TestAuthorities,
 	) -> MockNetworkBridgeTx {
-		Self { network, to_network_interface, test_authorithies }
+		Self { network, to_network_interface, test_authorities }
 	}
 }
 
@@ -125,13 +125,13 @@ impl MockNetworkBridgeTx {
 						}
 					},
 					NetworkBridgeTxMessage::ReportPeer(_) => {
-						// ingore rep changes
+						// ignore rep changes
 					},
 					NetworkBridgeTxMessage::SendValidationMessage(peers, message) => {
 						for peer in peers {
 							self.to_network_interface
 								.unbounded_send(NetworkMessage::MessageFromNode(
-									self.test_authorithies
+									self.test_authorities
 										.peer_id_to_authority
 										.get(&peer)
 										.unwrap()