Anchor pre-PR: Dependency cleanup (#6769)

* remove ensure_dir_exists (2 deps saved)

* group UNHANDLED_ERRORs into a generic (2 deps saved)

* Introduce separate `health_metrics` crate

* separate health_metrics crate

* remove metrics from warp_utils

* move ProcessHealth::observe and SystemHealth::observe to health_metrics

* fix errors

* nitpick `Cargo.toml`s

---------

Co-authored-by: Daniel Knopik <daniel@dknopik.de>

---------

Co-authored-by: ThreeHrSleep <151536303+ThreeHrSleep@users.noreply.github.com>

validator_client/http_api/Cargo.toml

@@ -21,6 +21,7 @@ eth2_keystore = { workspace = true }
 ethereum_serde_utils = { workspace = true }
 filesystem = { workspace = true }
 graffiti_file = { workspace = true }
+health_metrics = { workspace = true }
 initialized_validators = { workspace = true }
 lighthouse_validator_store =  { workspace = true }
 lighthouse_version = { workspace = true }

validator_client/http_api/src/lib.rs

@@ -33,6 +33,7 @@ use eth2::lighthouse_vc::{
         PublicKeyBytes, SetGraffitiRequest,
     },
 };
+use health_metrics::observe::Observe;
 use lighthouse_version::version_with_platform;
 use logging::SSELoggingComponents;
 use parking_lot::RwLock;

validator_client/http_metrics/Cargo.toml

@@ -5,6 +5,7 @@ edition = { workspace = true }
 authors = ["Sigma Prime <contact@sigmaprime.io>"]
 
 [dependencies]
+health_metrics = { workspace = true }
 lighthouse_validator_store = { workspace = true }
 lighthouse_version = { workspace = true }
 malloc_utils = { workspace = true }
@@ -16,5 +17,6 @@ slot_clock = { workspace = true }
 types = { workspace = true }
 validator_metrics = { workspace = true }
 validator_services = { workspace = true }
+validator_store = { workspace = true }
 warp = { workspace = true }
 warp_utils = { workspace = true }

validator_client/http_metrics/src/lib.rs

@@ -208,7 +208,7 @@ pub fn gather_prometheus_metrics<E: EthSpec>(
         scrape_allocator_metrics();
     }
 
-    warp_utils::metrics::scrape_health_metrics();
+    health_metrics::metrics::scrape_health_metrics();
 
     encoder
         .encode(&metrics::gather(), &mut buffer)