Update local testnet scripts for the fulu fork (#8489)

* Remove `fulu-devnet-3` testing on CI
* Delete `scripts/local_testnet/network_params_das.yaml` and consolidate it into the main `network_params.yaml` file we use on CI
* Delete enclave before building image, so it doesn't cause slow image building.


  


Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>

scripts/tests/checkpoint-sync-config-devnet.yaml

@@ -1,24 +0,0 @@
-# Kurtosis config file to checkpoint sync to a running devnet supported by ethPandaOps and `ethereum-package`.
-participants:
-  - cl_type: lighthouse
-    cl_image: lighthouse:local
-    el_type: geth
-    el_image: ethpandaops/geth:master
-    cl_extra_params:
-      - --disable-backfill-rate-limiting
-    supernode: true
-  - cl_type: lighthouse
-    cl_image: lighthouse:local
-    el_type: geth
-    el_image: ethpandaops/geth:master
-    cl_extra_params:
-      - --disable-backfill-rate-limiting
-    supernode: false
-
-checkpoint_sync_enabled: true
-checkpoint_sync_url: "https://checkpoint-sync.fusaka-devnet-3.ethpandaops.io"
-
-global_log_level: debug
-
-network_params:
-  network: fusaka-devnet-3