Update local testnet scripts, fix eth1 sim (#1184)

* Update local testnet scripts

* Add logs when decrypting validators

* Update comment

* Update account manager

* Make random key generation explicit

* Remove unnecessary clap constraint

* Only decrypt voting keypair for eth1 deposit

* Use insecure kdf for insecure keypairs

* Simplify local testnet keygen

* Update local testnet

* Fix eth1 sim

* Add eth1 sim to CI again

* Remove old local testnet docs

* Tidy

* Remove checks for existing validators

* Tidy

* Fix typos

lcli/src/insecure_validators.rs

@@ -0,0 +1,33 @@
+use clap::ArgMatches;
+use std::fs;
+use std::path::PathBuf;
+use validator_dir::Builder as ValidatorBuilder;
+
+pub fn run(matches: &ArgMatches) -> Result<(), String> {
+    let validator_count: usize = clap_utils::parse_required(matches, "count")?;
+    let validators_dir: PathBuf = clap_utils::parse_required(matches, "validators-dir")?;
+    let secrets_dir: PathBuf = clap_utils::parse_required(matches, "secrets-dir")?;
+
+    if !validators_dir.exists() {
+        fs::create_dir_all(&validators_dir)
+            .map_err(|e| format!("Unable to create validators dir: {:?}", e))?;
+    }
+
+    if !secrets_dir.exists() {
+        fs::create_dir_all(&secrets_dir)
+            .map_err(|e| format!("Unable to create secrets dir: {:?}", e))?;
+    }
+
+    for i in 0..validator_count {
+        println!("Validator {}/{}", i + 1, validator_count);
+
+        ValidatorBuilder::new(validators_dir.clone(), secrets_dir.clone())
+            .store_withdrawal_keystore(false)
+            .insecure_voting_keypair(i)
+            .map_err(|e| format!("Unable to generate keys: {:?}", e))?
+            .build()
+            .map_err(|e| format!("Unable to build validator: {:?}", e))?;
+    }
+
+    Ok(())
+}