Require manual confirmation to purge database with purge-db (#6154)

* Require manual confirmation to purge database

* Fix tests

* Rename to `purge-db-force and skip in non-interactive mode

* Do not skip when stdin_inputs is true

* Change prompt to be info logging to ensure consistent output

* Update warning text

* Move delete log after deletion

lighthouse/src/main.rs

@@ -1,6 +1,7 @@
 mod cli;
 mod metrics;
 
+use account_utils::STDIN_INPUTS_FLAG;
 use beacon_node::ProductionBeaconNode;
 use clap::FromArgMatches;
 use clap::Subcommand;
@@ -104,6 +105,16 @@ fn main() {
         )
         .long_version(LONG_VERSION.as_str())
         .display_order(0)
+        .arg(
+            Arg::new(STDIN_INPUTS_FLAG)
+                .long(STDIN_INPUTS_FLAG)
+                .action(ArgAction::SetTrue)
+                .help("If present, read all user inputs from stdin instead of tty.")
+                .help_heading(FLAG_HEADER)
+                .hide(cfg!(windows))
+                .global(true)
+                .display_order(0),
+        )
         .arg(
             Arg::new("env_log")
                 .short('l')

lighthouse/tests/account_manager.rs

@@ -15,7 +15,7 @@ use account_manager::{
 use account_utils::{
     eth2_keystore::KeystoreBuilder,
     validator_definitions::{SigningDefinition, ValidatorDefinition, ValidatorDefinitions},
-    ZeroizeString,
+    ZeroizeString, STDIN_INPUTS_FLAG,
 };
 use slashing_protection::{SlashingDatabase, SLASHING_PROTECTION_FILENAME};
 use std::env;