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/bin/utils/subkey/src/lib.rs

@@ -94,10 +94,10 @@
 //! seed** (also called **Private Key**). Those 2 secrets are the pieces of information you MUST
 //! keep safe and secret. All the other information below can be derived from those secrets.
 //!
-//! The output above also show the **public key** and the **Account ID**. Those are the independant
+//! The output above also show the **public key** and the **Account ID**. Those are the independent
 //! from the network where you will use the key.
 //!
-//! The **SS58 address** (or **Public Address**) of a new account is a reprensentation of the public
+//! The **SS58 address** (or **Public Address**) of a new account is a representation of the public
 //! keys of an account for a given network (for instance Kusama or Polkadot).
 //!
 //! You can read more about the [SS58 format in the Substrate Docs](https://docs.substrate.io/reference/address-formats/) and see the list of reserved prefixes in the [SS58 Registry](https://github.com/paritytech/ss58-registry).
@@ -110,7 +110,7 @@
 //!
 //! ### Json output
 //!
-//! `subkey` can calso generate the output as *json*. This is useful for automation.
+//! `subkey` can also generate the output as *json*. This is useful for automation.
 //!
 //! command:
 //!
@@ -163,7 +163,7 @@
 //!   SS58 Address:     5He5pZpc7AJ8evPuab37vJF6KkFDqq9uDq2WXh877Qw6iaVC
 //! ```
 //!
-//! Using the `inspect` command (see more details below), we see that knowning only the **secret
+//! Using the `inspect` command (see more details below), we see that knowing only the **secret
 //! seed** is no longer sufficient to recover the account:
 //!
 //! ```bash
@@ -184,7 +184,7 @@
 //!
 //! ### Inspecting a key
 //!
-//! If you have *some data* about a key, `subkey inpsect` will help you discover more information
+//! If you have *some data* about a key, `subkey inspect` will help you discover more information
 //! about it.
 //!
 //! If you have **secrets** that you would like to verify for instance, you can use: