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/primitives/src/v6/mod.rs

@@ -1457,7 +1457,7 @@ pub enum ValidDisputeStatementKind {
 	#[codec(index = 3)]
 	ApprovalChecking,
 	/// An approval vote from the new version.
-	/// We can't create this version untill all nodes
+	/// We can't create this version until all nodes
 	/// have been updated to support it and max_approval_coalesce_count
 	/// is set to more than 1.
 	#[codec(index = 4)]
@@ -1604,7 +1604,7 @@ impl ValidityAttestation {
 	pub fn to_compact_statement(&self, candidate_hash: CandidateHash) -> CompactStatement {
 		// Explicit and implicit map directly from
 		// `ValidityVote::Valid` and `ValidityVote::Issued`, and hence there is a
-		// `1:1` relationshow which enables the conversion.
+		// `1:1` relationship which enables the conversion.
 		match *self {
 			ValidityAttestation::Implicit(_) => CompactStatement::Seconded(candidate_hash),
 			ValidityAttestation::Explicit(_) => CompactStatement::Valid(candidate_hash),

polkadot/primitives/src/vstaging/mod.rs

@@ -102,7 +102,7 @@ pub struct SchedulerParams<BlockNumber> {
 	pub on_demand_fee_variability: Perbill,
 	/// The minimum amount needed to claim a slot in the spot pricing queue.
 	pub on_demand_base_fee: Balance,
-	/// The number of blocks a claim stays in the scheduler's claimqueue before getting cleared.
+	/// The number of blocks a claim stays in the scheduler's claim queue before getting cleared.
 	/// This number should go reasonably higher than the number of blocks in the async backing
 	/// lookahead.
 	pub ttl: BlockNumber,
@@ -133,7 +133,7 @@ pub type NodeFeatures = BitVec<u8, bitvec::order::Lsb0>;
 
 /// Module containing feature-specific bit indices into the `NodeFeatures` bitvec.
 pub mod node_features {
-	/// A feature index used to indentify a bit into the node_features array stored
+	/// A feature index used to identify a bit into the node_features array stored
 	/// in the HostConfiguration.
 	#[repr(u8)]
 	pub enum FeatureIndex {