Fix base-path handling in key insert (#7775)

This fixes the handling of base-path when using `key insert`. Before
the base-path wasn't setup correctly, as done when starting a node. This
resulted in putting the keys into the wrong directory. This pr fixes
this by creating the correct base-path/config dir for the keystore.
Besides that it also removes the insert command from `subkey` as it
doesn't make that much sense. If requested, we could bring it back later.

substrate/client/cli/src/commands/mod.rs

@@ -28,7 +28,7 @@ mod revert_cmd;
 mod run_cmd;
 mod generate_node_key;
 mod generate;
-mod insert;
+mod insert_key;
 mod inspect_node_key;
 mod inspect_key;
 mod key;
@@ -43,7 +43,7 @@ pub use self::{
 	purge_chain_cmd::PurgeChainCmd,
 	sign::SignCmd,
 	generate::GenerateCmd,
-	insert::InsertCmd,
+	insert_key::InsertKeyCmd,
 	inspect_key::InspectKeyCmd,
 	generate_node_key::GenerateNodeKeyCmd,
 	inspect_node_key::InspectNodeKeyCmd,