chore: checks existence of --test-threads=1

* With that we can decide to print or not the log::error related to the
  memory usage in tests.

test-context/src/lib.rs

@@ -120,7 +120,9 @@ impl AsyncTestContext for TrustifyContext {
 
  async fn teardown(self) {
  let peak_mem = PEAK_ALLOC.peak_usage_as_mb();
- if peak_mem > self.mem_limit_mb {
+ let args: Vec<String> = env::args().collect();
+ // Prints the error message when running the tests with threads=1
+ if args.iter().any(|arg| arg == "--test-threads=1") && peak_mem > self.mem_limit_mb {
  log::error!("Too much RAM used: {peak_mem} MB");
  }
  PEAK_ALLOC.reset_peak_usage();