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.~~

bridges/chains/chain-polkadot-bulletin/src/lib.rs

@@ -43,7 +43,7 @@ use sp_runtime::{traits::DispatchInfoOf, transaction_validity::TransactionValidi
 pub use bp_polkadot_core::{
 	AccountAddress, AccountId, Balance, Block, BlockNumber, Hash, Hasher, Header, Nonce, Signature,
 	SignedBlock, UncheckedExtrinsic, AVERAGE_HEADER_SIZE, EXTRA_STORAGE_PROOF_SIZE,
-	MAX_MANDATORY_HEADER_SIZE, REASONABLE_HEADERS_IN_JUSTIFICATON_ANCESTRY,
+	MAX_MANDATORY_HEADER_SIZE, REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY,
 };
 
 /// Maximal number of GRANDPA authorities at Polkadot Bulletin chain.
@@ -62,7 +62,7 @@ const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(90);
 
 // Re following constants - we are using the same values at Cumulus parachains. They are limited
 // by the maximal transaction weight/size. Since block limits at Bulletin Chain are larger than
-// at the Cumulus Bridgeg Hubs, we could reuse the same values.
+// at the Cumulus Bridge Hubs, we could reuse the same values.
 
 /// Maximal number of unrewarded relayer entries at inbound lane for Cumulus-based parachains.
 pub const MAX_UNREWARDED_RELAYERS_IN_CONFIRMATION_TX: MessageNonce = 1024;
@@ -207,8 +207,8 @@ impl Chain for PolkadotBulletin {
 impl ChainWithGrandpa for PolkadotBulletin {
 	const WITH_CHAIN_GRANDPA_PALLET_NAME: &'static str = WITH_POLKADOT_BULLETIN_GRANDPA_PALLET_NAME;
 	const MAX_AUTHORITIES_COUNT: u32 = MAX_AUTHORITIES_COUNT;
-	const REASONABLE_HEADERS_IN_JUSTIFICATON_ANCESTRY: u32 =
-		REASONABLE_HEADERS_IN_JUSTIFICATON_ANCESTRY;
+	const REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY: u32 =
+		REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY;
 	const MAX_MANDATORY_HEADER_SIZE: u32 = MAX_MANDATORY_HEADER_SIZE;
 	const AVERAGE_HEADER_SIZE: u32 = AVERAGE_HEADER_SIZE;
 }