Do unified descriptors covering x-only and other bitcoin key derivation

[dr-orlovsky]

To prevent situations like this:

descriptor-wallet/descriptors/src/derive.rs

Lines 63 to 76 in bc7a08d

	/// Creates scriptPubkey for specific derive pattern in pre-taproot
	/// descriptors
	fn script_pubkey_pretr<C: Verification>(
	&self,
	secp: &Secp256k1<C>,
	pat: impl AsRef<[UnhardenedIndex]>,
	) -> Result<Script, DeriveError>;
	/// Creates scriptPubkey for specific derive pattern in taproot descriptors
	fn script_pubkey_tr<C: Verification>(
	&self,
	secp: &Secp256k1<C>,
	pat: impl AsRef<[UnhardenedIndex]>,
	) -> Result<Script, DeriveError>;

and like this, where a potential bugs may happen:

descriptor-wallet/onchain/src/resolvers/mod.rs

Lines 119 to 130 in bc7a08d

	let scripts = indexes
	.into_iter()
	.map(|index| {
	if let Some(i) = derivation.borrow_mut().last_mut() {
	*i = index
	}
	Ok((
	index,
	descriptor.script_pubkey_pretr(secp, &*derivation.borrow())?,
	))
	})
	.collect::<Result<BTreeMap<_, _>, DeriveError>>()?;