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/core/pvf/src/host.rs

@@ -917,7 +917,7 @@ async fn sweeper_task(mut sweeper_rx: mpsc::Receiver<PathBuf>) {
 				gum::trace!(
 					target: LOG_TARGET,
 					?result,
-					"Sweeped the artifact file {}",
+					"Swept the artifact file {}",
 					condemned.display(),
 				);
 			},

polkadot/node/core/pvf/src/priority.rs

@@ -29,7 +29,7 @@ pub enum Priority {
 }
 
 impl Priority {
-	/// Returns `true` if `self` is `Crticial`
+	/// Returns `true` if `self` is `Critical`
 	pub fn is_critical(self) -> bool {
 		self == Priority::Critical
 	}

polkadot/node/core/pvf/src/worker_interface.rs

@@ -130,11 +130,11 @@ where
 		fn make_tmppath(prefix: &str, dir: &Path) -> PathBuf {
 			use rand::distributions::Alphanumeric;
 
-			const DESCRIMINATOR_LEN: usize = 10;
+			const DISCRIMINATOR_LEN: usize = 10;
 
-			let mut buf = Vec::with_capacity(prefix.len() + DESCRIMINATOR_LEN);
+			let mut buf = Vec::with_capacity(prefix.len() + DISCRIMINATOR_LEN);
 			buf.extend(prefix.as_bytes());
-			buf.extend(rand::thread_rng().sample_iter(&Alphanumeric).take(DESCRIMINATOR_LEN));
+			buf.extend(rand::thread_rng().sample_iter(&Alphanumeric).take(DISCRIMINATOR_LEN));
 
 			let s = std::str::from_utf8(&buf)
 				.expect("the string is collected from a valid utf-8 sequence; qed");