tests: Fix tests to reflect removal of rw as default option

[ricardobranco777]

Behaviour changed upstream with containers/podman#25942

Verification run: https://openqa.opensuse.org/tests/5261848

Fixes:

# Test messages # test_container_mounts
# failure: 

AssertionError: 'size=456k,rprivate,nosuid,nodev,tmpcopyup' != 'size=456k,rw,rprivate,nosuid,nodev,tmpcopyup'
- size=456k,rprivate,nosuid,nodev,tmpcopyup
+ size=456k,rw,rprivate,nosuid,nodev,tmpcopyup
?          +++
self = <podman.tests.integration.test_container_create.ContainersIntegrationTest testMethod=test_container_mounts>

    def test_container_mounts(self):
        """Test passing mounts"""
        with self.subTest("Check bind mount"):
            mount = {
                "type": "bind",
                "source": "/etc/hosts",
                "target": "/test",
                "read_only": True,
                "relabel": "Z",
            }
            container = self.client.containers.create(
                self.alpine_image, command=["cat", "/test"], mounts=[mount]
            )
            self.containers.append(container)
            self.assertIn(
                f"{mount['source']}:{mount['target']}:ro,Z,rprivate,rbind",
                container.attrs.get('HostConfig', {}).get('Binds', list()),
            )
    
            # check if container can be started and exits with EC == 0
            container.start()
            container.wait()
    
            self.assertEqual(container.attrs.get('State', dict()).get('ExitCode', 256), 0)
    
        with self.subTest("Check tmpfs mount"):
            mount = {"type": "tmpfs", "source": "tmpfs", "target": "/test", "size": "456k"}
            container = self.client.containers.create(
                self.alpine_image, command=["df", "-h"], mounts=[mount]
            )
            self.containers.append(container)
>           self.assertEqual(
                container.attrs.get('HostConfig', {}).get('Tmpfs', {}).get(mount['target']),
                f"size={mount['size']},rw,rprivate,nosuid,nodev,tmpcopyup",
            )
E           AssertionError: 'size=456k,rprivate,nosuid,nodev,tmpcopyup' != 'size=456k,rw,rprivate,nosuid,nodev,tmpcopyup'
E           - size=456k,rprivate,nosuid,nodev,tmpcopyup
E           + size=456k,rw,rprivate,nosuid,nodev,tmpcopyup
E           ?          +++

podman/tests/integration/test_container_create.py:274: AssertionError

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ricardobranco777
Once this PR has been reviewed and has the lgtm label, please assign jwhonce for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment