Remove dev consensus key (FuelLabs#1614)

This PR adds the following changes:

- removes `consensus_dev_key since the `produce_block` functionality can
now be controlled through the `debug` flag
- uses the dev consensus key in the debug mode regardless of the trigger
mode

CHANGELOG.md

@@ -21,6 +21,7 @@ Description of the upcoming release here.
 - [#1601](https://github.com/FuelLabs/fuel-core/pull/1601): Fix formatting in docs and check that `cargo doc` passes in the CI.
 
 #### Breaking
+- [#1614](https://github.com/FuelLabs/fuel-core/pull/#1614): Use the default consensus key regardless of trigger mode. The change is breaking because it removes the `--dev-keys` argument. If the `debug` flag is set, the default consensus key will be used, regardless of the trigger mode.
 - [#1596](https://github.com/FuelLabs/fuel-core/pull/1596) Make `Consensus` type a version-able enum
 - [#1593](https://github.com/FuelLabs/fuel-core/pull/1593) Make `Block` type a version-able enum
 - [#1576](https://github.com/FuelLabs/fuel-core/pull/1576): The change moves the implementation of the storage traits for required tables from `fuel-core` to `fuel-core-storage` crate. The change also adds a more flexible configuration of the encoding/decoding per the table and allows the implementation of specific behaviors for the table in a much easier way. It unifies the encoding between database, SMTs, and iteration, preventing mismatching bytes representation on the Rust type system level. Plus, it increases the re-usage of the code by applying the same blueprint to other tables.

bin/fuel-core/src/cli/run.rs

@@ -142,11 +142,6 @@ pub struct Command {
     #[clap(flatten)]
     pub poa_trigger: PoATriggerArgs,
 
-    /// Use a default insecure consensus key for testing purposes.
-    /// This will not be enabled by default in the future.
-    #[arg(long = "dev-keys", default_value = "true", env)]
-    pub consensus_dev_key: bool,
-
     /// The block's fee recipient public key.
     ///
     /// If not set, `consensus_key` is used as the provider of the `Address`.
@@ -226,7 +221,6 @@ impl Command {
             min_gas_price,
             consensus_key,
             poa_trigger,
-            consensus_dev_key,
             coinbase_recipient,
             #[cfg(feature = "relayer")]
             relayer_args,
@@ -266,25 +260,25 @@ impl Command {
             info!("Block production disabled");
         }
 
+        let consensus_key = load_consensus_key(consensus_key)?;
+        if consensus_key.is_some() && trigger == Trigger::Never {
+            warn!("Consensus key configured but block production is disabled!");
+        }
+
         // if consensus key is not configured, fallback to dev consensus key
-        let consensus_key = load_consensus_key(consensus_key)?.or_else(|| {
-            if consensus_dev_key && trigger != Trigger::Never {
+        let consensus_key = consensus_key.or_else(|| {
+            if debug {
                 let key = default_consensus_dev_key();
                 warn!(
                     "Fuel Core is using an insecure test key for consensus. Public key: {}",
                     key.public_key()
                 );
                 Some(Secret::new(key.into()))
             } else {
-                // if consensus dev key is disabled, use no key
                 None
             }
         });
 
-        if consensus_key.is_some() && trigger == Trigger::Never {
-            warn!("Consensus key configured but block production is disabled!")
-        }
-
         let coinbase_recipient = if let Some(coinbase_recipient) = coinbase_recipient {
             Some(
                 ContractId::from_str(coinbase_recipient.as_str())