[GR-65849] Avoid tracing during VM operations.

[graalvmbot]

Tracing triggers synchronization (b.c. of thread-safe data structures), which cannot be performed within a VM operation.

The following test case (with tracing enabled) reproduces the failure before the change, and runs without failure after the change:

public class Main {
  public static void main(String[] args) {
   System.out.println(Thread.getAllStackTraces());
  }
}