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/society/src/migrations.rs

@@ -240,7 +240,7 @@ pub fn assert_internal_consistency<T: Config<I>, I: Instance + 'static>() {
 pub fn from_original<T: Config<I>, I: Instance + 'static>(
 	past_payouts: &mut [(<T as frame_system::Config>::AccountId, BalanceOf<T, I>)],
 ) -> Result<Weight, &'static str> {
-	// Migrate Bids from old::Bids (just a trunctation).
+	// Migrate Bids from old::Bids (just a truncation).
 	Bids::<T, I>::put(BoundedVec::<_, T::MaxBids>::truncate_from(v0::Bids::<T, I>::take()));
 
 	// Initialise round counter.
@@ -287,13 +287,13 @@ pub fn from_original<T: Config<I>, I: Instance + 'static>(
 				.defensive_ok_or("member_count > 0, we must have at least 1 member")?;
 			// Swap the founder with the first member in MemberByIndex.
 			MemberByIndex::<T, I>::swap(0, member_count);
-			// Update the indicies of the swapped member MemberRecords.
+			// Update the indices of the swapped member MemberRecords.
 			Members::<T, I>::mutate(&member, |m| {
 				if let Some(member) = m {
 					member.index = 0;
 				} else {
 					frame_support::defensive!(
-						"Member somehow disapeared from storage after it was inserted"
+						"Member somehow disappeared from storage after it was inserted"
 					);
 				}
 			});
@@ -302,7 +302,7 @@ pub fn from_original<T: Config<I>, I: Instance + 'static>(
 					member.index = member_count;
 				} else {
 					frame_support::defensive!(
-						"Member somehow disapeared from storage after it was queried"
+						"Member somehow disappeared from storage after it was queried"
 					);
 				}
 			});