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/salary/src/tests/integration.rs

@@ -250,7 +250,7 @@ fn swap_exhaustive_works() {
 		});
 
 		assert_eq!(root_add, root_swap);
-		// Ensure that we dont compare trivial stuff like `()` from a type error above.
+		// Ensure that we don't compare trivial stuff like `()` from a type error above.
 		assert_eq!(root_add.len(), 32);
 	});
 }

substrate/frame/salary/src/tests/unit.rs

@@ -508,7 +508,7 @@ fn zero_payment_fails() {
 }
 
 #[test]
-fn unregistered_bankrupcy_fails_gracefully() {
+fn unregistered_bankruptcy_fails_gracefully() {
 	new_test_ext().execute_with(|| {
 		assert_ok!(Salary::init(RuntimeOrigin::signed(1)));
 		set_rank(1, 2);
@@ -532,7 +532,7 @@ fn unregistered_bankrupcy_fails_gracefully() {
 }
 
 #[test]
-fn registered_bankrupcy_fails_gracefully() {
+fn registered_bankruptcy_fails_gracefully() {
 	new_test_ext().execute_with(|| {
 		assert_ok!(Salary::init(RuntimeOrigin::signed(1)));
 		set_rank(1, 2);
@@ -561,7 +561,7 @@ fn registered_bankrupcy_fails_gracefully() {
 }
 
 #[test]
-fn mixed_bankrupcy_fails_gracefully() {
+fn mixed_bankruptcy_fails_gracefully() {
 	new_test_ext().execute_with(|| {
 		assert_ok!(Salary::init(RuntimeOrigin::signed(1)));
 		set_rank(1, 2);
@@ -589,7 +589,7 @@ fn mixed_bankrupcy_fails_gracefully() {
 }
 
 #[test]
-fn other_mixed_bankrupcy_fails_gracefully() {
+fn other_mixed_bankruptcy_fails_gracefully() {
 	new_test_ext().execute_with(|| {
 		assert_ok!(Salary::init(RuntimeOrigin::signed(1)));
 		set_rank(1, 2);