ci: fix installing nodejs deps in the tests (#973)

## Description

The PR fixes breaking tests that are related to the execution in the CI
only.

engine-tests/src/utils/one_inch/mod.rs

@@ -13,13 +13,15 @@ pub static LIMIT_ORDER_PROTOCOL_PATH: LazyLock<PathBuf> =
     LazyLock::new(|| download_and_compile_solidity_sources("limit-order-protocol"));
 
 fn download_and_compile_solidity_sources(repo_name: &str) -> PathBuf {
-    let sources_dir = Path::new("target").join(repo_name);
-
+    let sources_dir = Path::new(env!("CARGO_MANIFEST_DIR"))
+        .join("target")
+        .join(repo_name);
     // Contracts not already present, so download and compile them (but only once, even
     // if multiple tests running in parallel saw `contracts_dir` does not exist).
     if !sources_dir.exists() {
         let url = format!("https://github.com/1inch/{repo_name}");
         let repo = git2::Repository::clone(&url, &sources_dir).unwrap();
+
         if repo_name == "limit-order-protocol" {
             let commit_hash = git2::Oid::from_str(HASH_COMMIT).unwrap();
             repo.set_head_detached(commit_hash).unwrap();
@@ -31,7 +33,7 @@ fn download_and_compile_solidity_sources(repo_name: &str) -> PathBuf {
     // install packages
     let output = Command::new("/usr/bin/env")
         .current_dir(&sources_dir)
-        .args(["yarn", "install", "--network-concurrency", "1"])
+        .args(["yarn", "install"])
         .output()
         .unwrap();
     assert!(
@@ -40,22 +42,22 @@ fn download_and_compile_solidity_sources(repo_name: &str) -> PathBuf {
         String::from_utf8_lossy(&output.stderr),
     );
 
-    let hardhat = |command: &str| {
-        let output = Command::new("/usr/bin/env")
-            .current_dir(&sources_dir)
-            .args(["node", "node_modules/hardhat/internal/cli/cli.js", command])
-            .output()
-            .unwrap();
-        assert!(
-            output.status.success(),
-            "Unsuccessful exit status while install while executing `{command}`: {}",
-            String::from_utf8_lossy(&output.stderr)
-        );
-    };
-
-    // clean and compile
-    hardhat("clean");
-    hardhat("compile");
+    // clean and compile EVM contracts
+    hardhat(&sources_dir, "clean");
+    hardhat(&sources_dir, "compile");
 
     sources_dir.join("artifacts/contracts")
 }
+
+fn hardhat(sources_dir: impl AsRef<Path>, command: &str) {
+    let output = Command::new("/usr/bin/env")
+        .current_dir(sources_dir)
+        .args(["node", "node_modules/hardhat/internal/cli/cli.js", command])
+        .output()
+        .unwrap();
+    assert!(
+        output.status.success(),
+        "Unsuccessful exit status while install while executing `{command}`: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+}