feat: enable teku split beacon <> validator setup (#409)

.github/tests/split-teku.yaml

@@ -0,0 +1,21 @@
+participants:
+  - el_client_type: geth
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+    validator_count: 0
+  - el_client_type: nethermind
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: erigon
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: besu
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: reth
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: ethereumjs
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+additional_services: []

src/cl/nimbus/nimbus_launcher.star

@@ -47,10 +47,6 @@ VALIDATOR_MAX_MEMORY = 512
 DEFAULT_VALIDATOR_IMAGE_ENTRYPOINT = ["nimbus_validator_client"]
 
 VALIDATOR_METRICS_PATH = "/metrics"
-
-VALIDATOR_KEYS_DIRPATH_ON_SERVICE_CONTAINER = "$HOME/validator-keys"
-VALIDATOR_SECRETS_DIRPATH_ON_SERVICE_CONTAINER = "$HOME/validator-secrets"
-
 # ---------------------------------- Genesis Files ----------------------------------
 
 # Nimbus requires that its data directory already exists (because it expects you to bind-mount it), so we
@@ -360,7 +356,7 @@ def get_beacon_config(
     files = {
         constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: el_cl_genesis_data.files_artifact_uuid,
     }
-    if node_keystore_files:
+    if node_keystore_files != None and not split_mode_enabled:
         files[
             VALIDATOR_KEYS_MOUNTPOINT_ON_CLIENTS
         ] = node_keystore_files.files_artifact_uuid