[stable-2.18] ansible-test - Improve container network detection (#84323) (#84338)

When detection of the current container network fails, a warning is now issued and execution continues.
This simplifies usage in cases where the current container cannot be inspected, such as when running in GitHub Codespaces.

(cherry picked from commit 95e3af3e0f)

changelogs/fragments/ansible-test-network-detection.yml

@@ -0,0 +1,3 @@
+minor_changes:
+  - ansible-test - When detection of the current container network fails, a warning is now issued and execution continues.
+    This simplifies usage in cases where the current container cannot be inspected, such as when running in GitHub Codespaces.

test/lib/ansible_test/_internal/containers.py

@@ -292,10 +292,13 @@ def get_docker_preferred_network_name(args: EnvironmentConfig) -> t.Optional[str
         current_container_id = get_docker_container_id()
 
         if current_container_id:
-            # Make sure any additional containers we launch use the same network as the current container we're running in.
-            # This is needed when ansible-test is running in a container that is not connected to Docker's default network.
-            container = docker_inspect(args, current_container_id, always=True)
-            network = container.get_network_name()
+            try:
+                # Make sure any additional containers we launch use the same network as the current container we're running in.
+                # This is needed when ansible-test is running in a container that is not connected to Docker's default network.
+                container = docker_inspect(args, current_container_id, always=True)
+                network = container.get_network_name()
+            except ContainerNotFoundError:
+                display.warning('Unable to detect the network for the current container. Use the `--docker-network` option if containers are unreachable.')
 
     # The default docker behavior puts containers on the same network.
     # The default podman behavior puts containers on isolated networks which don't allow communication between containers or network disconnect.