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.~~

substrate/frame/contracts/src/benchmarking/mod.rs

@@ -340,7 +340,7 @@ mod benchmarks {
 		assert_eq!(StorageVersion::get::<Pallet<T>>(), version);
 	}
 
-	// This benchmarks the weight of dispatching migrate to execute 1 `NoopMigraton`
+	// This benchmarks the weight of dispatching migrate to execute 1 `NoopMigration`
 	#[benchmark(pov_mode = Measured)]
 	fn migrate() {
 		let latest_version = LATEST_MIGRATION_VERSION;
@@ -1859,7 +1859,7 @@ mod benchmarks {
 
 	// We call unique accounts.
 	//
-	// This is a slow call: We redeuce the number of runs.
+	// This is a slow call: We reduce the number of runs.
 	#[benchmark(pov_mode = Measured)]
 	fn seal_call(r: Linear<0, { API_BENCHMARK_RUNS / 2 }>) -> Result<(), BenchmarkError> {
 		let dummy_code = WasmModule::<T>::dummy_with_bytes(0);
@@ -1937,7 +1937,7 @@ mod benchmarks {
 		Ok(())
 	}
 
-	// This is a slow call: We redeuce the number of runs.
+	// This is a slow call: We reduce the number of runs.
 	#[benchmark(pov_mode = Measured)]
 	fn seal_delegate_call(r: Linear<0, { API_BENCHMARK_RUNS / 2 }>) -> Result<(), BenchmarkError> {
 		let hashes = (0..r)
@@ -2473,7 +2473,7 @@ mod benchmarks {
 
 	// Only calling the function itself for the list of
 	// generated different ECDSA keys.
-	// This is a slow call: We redeuce the number of runs.
+	// This is a slow call: We reduce the number of runs.
 	#[benchmark(pov_mode = Measured)]
 	fn seal_ecdsa_to_eth_address(
 		r: Linear<0, { API_BENCHMARK_RUNS / 10 }>,