Squash merge of 3565

Squashed commit of the following:

commit a4960ebfd7
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Sep 12 12:10:23 2022 +1000

    Clippy

commit b28e8d0848
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Sep 12 11:41:45 2022 +1000

    Add flag to disable prune on startup

commit de775d6aa5
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Sep 12 11:19:21 2022 +1000

    Fix and update beacon chain tests

commit 2289b20bca
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Fri Sep 9 17:40:21 2022 +1000

    Implement DB manager command

commit d5adc2ebc5
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Fri Sep 9 12:56:27 2022 +1000

    Implement on-demand pruning operation

commit 69d54741c1
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Thu Sep 8 16:25:04 2022 +1000

    Delete finalized exec payloads while running

beacon_node/src/cli.rs

@@ -515,6 +515,13 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
                 .takes_value(true)
                 .default_value("true")
         )
+        .arg(
+            Arg::with_name("prune-payloads-on-startup")
+                .long("prune-payloads-on-startup")
+                .help("Check for execution payloads to prune on start-up.")
+                .takes_value(true)
+                .default_value("true")
+        )
 
         /*
          * Misc.

beacon_node/src/config.rs

@@ -358,6 +358,12 @@ pub fn get_config<E: EthSpec>(
             .map_err(|_| "auto-compact-db takes a boolean".to_string())?;
     }
 
+    if let Some(prune_payloads_on_init) =
+        clap_utils::parse_optional(cli_args, "prune-payloads-on-startup")?
+    {
+        client_config.store.prune_payloads_on_init = prune_payloads_on_init;
+    }
+
     /*
      * Zero-ports
      *