Use only lighthouse types in the mock builder (#4793)

## Proposed Changes

- only use LH types to avoid build issues
- use warp instead of axum for the server to avoid importing the dep

## Additional Info

- wondering if we can move the `execution_layer/test_utils` to its own crate and import it as a dev dependency
- this would be made easier by separating out our engine API types into their own crate so we can use them in the test crate
- or maybe we can look into using reth types for the engine api if they are in their own crate


Co-authored-by: realbigsean <seananderson33@gmail.com>

beacon_node/execution_layer/Cargo.toml

@@ -41,11 +41,6 @@ lazy_static = { workspace = true }
 ethers-core = { workspace = true }
 builder_client = { path = "../builder_client" }
 fork_choice = { workspace = true }
-mev-rs = { git = "https://github.com/ralexstokes/mev-rs", rev = "216657016d5c0889b505857c89ae42c7aa2764af" }
-axum = "0.6"
-hyper = "0.14"
-ethereum-consensus = { git = "https://github.com/ralexstokes/ethereum-consensus", rev = "e380108" }
-ssz_rs = "0.9.0"
 tokio-stream = { workspace = true }
 strum = { workspace = true }
 keccak-hash = "0.10.0"