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/primitives/runtime/src/chain.rs

@@ -104,7 +104,7 @@ pub trait Chain: Send + Sync + 'static {
 	const ID: ChainId;
 
 	/// A type that fulfills the abstract idea of what a Substrate block number is.
-	// Constraits come from the associated Number type of `sp_runtime::traits::Header`
+	// Constraints come from the associated Number type of `sp_runtime::traits::Header`
 	// See here for more info:
 	// https://crates.parity.io/sp_runtime/traits/trait.Header.html#associatedtype.Number
 	//
@@ -125,7 +125,7 @@ pub trait Chain: Send + Sync + 'static {
 		+ MaxEncodedLen;
 
 	/// A type that fulfills the abstract idea of what a Substrate hash is.
-	// Constraits come from the associated Hash type of `sp_runtime::traits::Header`
+	// Constraints come from the associated Hash type of `sp_runtime::traits::Header`
 	// See here for more info:
 	// https://crates.parity.io/sp_runtime/traits/trait.Header.html#associatedtype.Hash
 	type Hash: Parameter
@@ -143,7 +143,7 @@ pub trait Chain: Send + Sync + 'static {
 
 	/// A type that fulfills the abstract idea of what a Substrate hasher (a type
 	/// that produces hashes) is.
-	// Constraits come from the associated Hashing type of `sp_runtime::traits::Header`
+	// Constraints come from the associated Hashing type of `sp_runtime::traits::Header`
 	// See here for more info:
 	// https://crates.parity.io/sp_runtime/traits/trait.Header.html#associatedtype.Hashing
 	type Hasher: HashT<Output = Self::Hash>;

bridges/primitives/runtime/src/lib.rs

@@ -56,7 +56,7 @@ mod chain;
 mod storage_proof;
 mod storage_types;
 
-// Re-export macro to aviod include paste dependency everywhere
+// Re-export macro to avoid include paste dependency everywhere
 pub use sp_runtime::paste;
 
 /// Use this when something must be shared among all instances.
@@ -461,7 +461,7 @@ macro_rules! generate_static_str_provider {
 	};
 }
 
-/// Error message that is only dispayable in `std` environment.
+/// Error message that is only displayable in `std` environment.
 #[derive(Encode, Decode, Clone, Eq, PartialEq, PalletError, TypeInfo)]
 #[scale_info(skip_type_params(T))]
 pub struct StrippableError<T> {