Validator manager commands for the Keymanager APIs (#6261)

* Validator manager commands for standard key-manager APIs

* Merge latest unstable

* Fix Some in lib.rs

* Replace Arg::with_name with Arg::new

* Update takes_value

* Remove clap::App

* Change App to Command

* Add command in use

* Remove generic in ArgMatches

* Fix matches.get_flag

* Fixes

* fix error handling

* SetTrue in import

* Fix

* Fix builder-proposal flag (will delete the flag later)

* Minor fix

* Fix prefer_builder_proposals

* Remove unwrap

* Error handling from Michael

* Add cli help text

* Use None in import to simplify

* Delete unwrap

* Revert flags option

* Simplify help command code

* Remove flag header in move

* Merge remote-tracking branch 'origin/unstable' into pahor/validator-manager-standard-keystore

* Add log in VC when keystore is deleted

* Delete duplicated log when validator does not exist

* Simplify log code

* Rename remove to delete

* cargo-fmt

* Try to remove a function

* make-cli

* Error handling

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* Update CLI hel text

* make-cli

* Fix checks

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* Try to fix check errors

* Fix test

* Remove changes

* Update flag name

* CLI display order

* Move builde_proposals flag

* Add doc

* mdlint

* Update validator_manager/src/list_validators.rs

Co-authored-by: Mac L <mjladson@pm.me>

* Delete empty line

* Fix list

* Simplify delete

* Add support to delete more validators

* Fix test

* Rename response

* Add (s)

* Add test to delete multiple validators

* Book and cli

* Make cli

* Only log when keystore is deleted

* Revise deletion log

* Add validator pubkey to error message

* Merge import

* Thank you Mac

* Test

* Add flags

* Error handling for password

* make cli

* Merge remote-tracking branch 'origin/unstable' into vm

* make cli

* Fix test

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* Fix test

* vm test

* Debug trait thank you Michael

* Fix test

* Merge branch 'unstable' into vm

* test

* testing

* Combine import validator(s)

* make cli

* Add requires

* Update book

* mdlint

* Only show import log when import is successful

* delete testing

* Test for standard format

* Test standard format

* Test

* fix builder_proposals flag

* Fix test for standard format

* Add requires

* Fix vm test

* make cli

* Remove flag header

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* make cli

* Delete space

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* Merge branch 'unstable' into vm

* Rename delete_validator to delete_validators

* Rearrange

* Remove pub in run function

* Fix grammar

* Apply suggestions from code review

Co-authored-by: Michael Sproul <micsproul@gmail.com>

* Remove description

* Merge branch 'vm' of https://github.com/chong-he/lighthouse into vm

* Close bracket

* make cli

* Revise list code and test

* Revise import flag

* make cli

* Comment out test

* Update vm test

* Simplify

* Merge remote-tracking branch 'origin/unstable' into vm

* make cli

* Add test

* Add password as a requirement for keystore file

* Correct flags in docs

* typo

validator_manager/src/lib.rs

@@ -8,7 +8,9 @@ use types::EthSpec;
 
 pub mod common;
 pub mod create_validators;
+pub mod delete_validators;
 pub mod import_validators;
+pub mod list_validators;
 pub mod move_validators;
 
 pub const CMD: &str = "validator_manager";
@@ -51,11 +53,14 @@ pub fn cli_app() -> Command {
                 .help("Prints help information")
                 .action(ArgAction::HelpLong)
                 .display_order(0)
-                .help_heading(FLAG_HEADER),
+                .help_heading(FLAG_HEADER)
+                .global(true),
         )
         .subcommand(create_validators::cli_app())
         .subcommand(import_validators::cli_app())
         .subcommand(move_validators::cli_app())
+        .subcommand(list_validators::cli_app())
+        .subcommand(delete_validators::cli_app())
 }
 
 /// Run the account manager, returning an error if the operation did not succeed.
@@ -83,6 +88,13 @@ pub fn run<E: EthSpec>(matches: &ArgMatches, env: Environment<E>) -> Result<(),
                     Some((move_validators::CMD, matches)) => {
                         move_validators::cli_run(matches, dump_config).await
                     }
+                    Some((list_validators::CMD, matches)) => {
+                        list_validators::cli_run(matches, dump_config).await
+                    }
+                    Some((delete_validators::CMD, matches)) => {
+                        delete_validators::cli_run(matches, dump_config).await
+                    }
+                    Some(("", _)) => Err("No command supplied. See --help.".to_string()),
                     Some((unknown, _)) => Err(format!(
                         "{} is not a valid {} command. See --help.",
                         unknown, CMD