fix: improve wallet connection response time (#6286)

Description
---
Improve the time a wallet will detect that the base node its connecting
to is up and running

Motivation and Context
---
The time between tries here was 3 secs previously, but an unrelated
change to the reuse of time variables bumped this up to 90 secs. This
means that even thou the wallet is technically connected to the base
node, the wallet service will wait for up to 90 secs before confirm this
is the case. This bumps it down to 5 secs.

How Has This Been Tested?
---
Manual

base_layer/wallet/src/connectivity_service/service.rs

@@ -43,6 +43,7 @@ use crate::{
 };
 
 const LOG_TARGET: &str = "wallet::connectivity";
+const CONNECTIVITY_WAIT: u64 = 5;
 
 /// Connection status of the Base Node
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
@@ -270,15 +271,15 @@ impl WalletConnectivityService {
                         self.config.base_node_monitor_max_refresh_interval.as_secs()
                     );
                     self.set_online_status(OnlineStatus::Offline);
-                    time::sleep(self.config.base_node_monitor_max_refresh_interval).await;
+                    time::sleep(Duration::from_secs(CONNECTIVITY_WAIT)).await;
                     continue;
                 },
                 Err(e) => {
                     warn!(target: LOG_TARGET, "{}", e);
                     if self.current_base_node().as_ref() == Some(&node_id) {
                         self.disconnect_base_node(node_id).await;
                         self.set_online_status(OnlineStatus::Offline);
-                        time::sleep(self.config.base_node_monitor_max_refresh_interval).await;
+                        time::sleep(Duration::from_secs(CONNECTIVITY_WAIT)).await;
                     }
                     continue;
                 },