Cli configurable validators (backport #18630) (#18665)

* rpc: more params for `GetVoteAccountsConfig`

(cherry picked from commit bf90ea282a)

# Conflicts:
#	docs/src/developing/clients/jsonrpc-api.md

* cli: allow returning more `solana validators`

(cherry picked from commit a4a24b6531)

# Conflicts:
#	Cargo.lock
#	cli/Cargo.toml
#	cli/src/cluster_query.rs

Co-authored-by: Trent Nelson <trent@solana.com>

client/src/rpc_config.rs

@@ -81,6 +81,8 @@ pub struct RpcGetVoteAccountsConfig {
     pub vote_pubkey: Option<String>, // validator vote address, as a base-58 encoded string
     #[serde(flatten)]
     pub commitment: Option<CommitmentConfig>,
+    pub keep_unstaked_delinquents: Option<bool>,
+    pub delinquent_slot_distance: Option<u64>,
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]