test(aya): iter: Disable the init system assertion in containers

It's hard to predict what's the PID of the first process in a container.
Use this assertion only on non-containerized systems.

test/integration-test/src/tests/iter.rs

@@ -1,4 +1,4 @@
-use std::io::BufRead;
+use std::{env, io::BufRead, path::Path};
 
 use aya::{programs::Iter, Btf, Ebpf};
 use test_log::test;
@@ -20,6 +20,9 @@ fn iter_task() {
     let line_init = lines.next().unwrap().unwrap();
 
     assert_eq!(line_title, "tgid     pid      name");
+    // It's hard to predict what's the PID of the first process in a container.
+    // Use this assertion only on non-containerized systems.
+    if !Path::new("/.dockerenv").exists() && env::var_os("container").is_none() {
         let expected_values = ["1        1        init", "1        1        systemd"];
         assert!(
             expected_values.contains(&line_init.as_str()),
@@ -27,4 +30,5 @@ fn iter_task() {
             line_init,
             expected_values
         );
+    }
 }