fix(l2): fix zkVM performance test (#1202)

**Motivation**

This test uses the `test_data/genesis-l2.json` and
`test_data/l2-loadtest.rlp` files. The genesis file was changed in
#1158, breaking the test because now the genesis block hash changed and
so the second block's parent isn't present in the chain anymore. The
test only executed in the CI whenever a file in `crates/l2/prover/` was
touched, leaving the breaking change unnoticed.


Needed for #1133

**Description**

- bring back the old genesis file as `test_data/genesis-l2-old.json` (a
better solution would be to regenerate`test_data/l2-loadtest.rlp`).
- change the test's CI job to always execute.

.github/workflows/l2_prover_ci.yaml

@@ -2,12 +2,8 @@ name: L2 Prover CI
 on:
   push:
     branches: ["main"]
-    paths:
-      - "crates/l2/prover/**"
   pull_request:
     branches: ["**"]
-    paths:
-      - "crates/l2/prover/**"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}

crates/l2/prover/tests/perf_zkvm.rs

@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::path::Path;
 use tracing::info;
 
 use ethereum_rust_blockchain::add_block;
@@ -11,15 +11,10 @@ use ethereum_rust_vm::execution_db::ExecutionDB;
 async fn test_performance_zkvm() {
     tracing_subscriber::fmt::init();
 
-    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-    // Go back 3 levels (Go to the root of the project)
-    for _ in 0..3 {
-        path.pop();
-    }
-    path.push("test_data");
+    let mut path = Path::new(concat!(env!("CARGO_MANIFEST_DIR"), "/../../../test_data"));
 
     // Another use is genesis-execution-api.json in conjunction with chain.rlp(20 blocks not too loaded).
-    let genesis_file_path = path.join("genesis-l2.json");
+    let genesis_file_path = path.join("genesis-l2-old.json");
     // l2-loadtest.rlp has blocks with many txs.
     let chain_file_path = path.join("l2-loadtest.rlp");