Insufficient key matching in ledger params

[sug0]

Currently, the ledger takes the following parameters:

namada/core/src/ledger/parameters/storage.rs

Lines 5 to 14 in f9d72f0

	const EPOCH_DURATION_KEY: &str = "epoch_duration";
	const VP_WHITELIST_KEY: &str = "vp_whitelist";
	const TX_WHITELIST_KEY: &str = "tx_whitelist";
	const MAX_EXPECTED_TIME_PER_BLOCK_KEY: &str = "max_expected_time_per_block";
	const IMPLICIT_VP_KEY: &str = "implicit_vp";
	const EPOCHS_PER_YEAR_KEY: &str = "epochs_per_year";
	const POS_GAIN_P_KEY: &str = "pos_gain_p";
	const POS_GAIN_D_KEY: &str = "pos_gain_d";
	const STAKED_RATIO_KEY: &str = "staked_ratio_key";
	const POS_INFLATION_AMOUNT_KEY: &str = "pos_inflation_amount_key";

However, when matching parameter storage keys, we only match against a subset of them:

namada/core/src/ledger/parameters/storage.rs

Lines 21 to 27 in f9d72f0

	/// Returns if the key is a protocol parameter key.
	pub fn is_protocol_parameter_key(key: &Key) -> bool {
	is_epoch_duration_storage_key(key)
	|| is_max_expected_time_per_block_key(key)
	|| is_tx_whitelist_key(key)
	|| is_vp_whitelist_key(key)
	}

We should add the remaining key matches to is_protocol_parameter_key, or better yet, create some sort of KeySet abstraction using, e.g. prefix trees, which will allow us to efficiently match against a large set of storage keys.