Make clippy _a little_ more annoying (#10570)

* Clippy: +complexity

* Update client/cli/src/arg_enums.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update bin/node/inspect/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update primitives/keystore/src/testing.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update frame/elections/src/lib.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* Update primitives/npos-elections/fuzzer/src/reduce.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* Incorporating feedback

* No need for Ok

* Additional

* Needed slice

* Wigy's suggestions on less derefs

* fix count

* reverting changes brought in by option_map_unit_fn

* add --all-targets

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

substrate/client/service/src/builder.rs

@@ -363,7 +363,7 @@ where
 		spawn_handle,
 		config.clone(),
 	)?;
-	Ok(crate::client::Client::new(
+	crate::client::Client::new(
 		backend,
 		executor,
 		genesis_storage,
@@ -373,7 +373,7 @@ where
 		prometheus_registry,
 		telemetry,
 		config,
-	)?)
+	)
 }
 
 /// Parameters to pass into `build`.