Change DB Manager Clap usage to derive (#5898)

* implement clap derive for the db manager

* tweak some clap configs

* make cli local

* add global to help flag

* fmt

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into HEAD

* merge

* add enum constraints to flag

database_manager/Cargo.toml

@@ -14,3 +14,4 @@ store = { workspace = true }
 types = { workspace = true }
 slog = { workspace = true }
 strum = { workspace = true }
+serde = { workspace = true }