chore: disable failing integration test

[dimaqq]

Description

This test uses the ghost charm:

https://charmhub.io/ghost?channel=latest/edge
https://charmhub.io/ghost

Which has not been updated since 2020 and only supports 16.04 and 14.04 bases.

I think that requires Juju 2.8, doesn't it?

I'll open a separate ticket to update the test.

[dimaqq]

Part of #1108

[dimaqq]

The set of integrations tests that fail is smaller with this PR:

XFAIL tests/integration/test_model.py::test_deploy_bundle_with_overlay_as_argument - The `ghost` charm is hopelessly out of date
FAILED tests/integration/test_application.py::test_action - juju.errors.JujuA...
FAILED tests/integration/test_charmhub.py::test_subordinate_false_field_exists
FAILED tests/integration/test_model.py::test_deploy_bundle_with_multiple_overlays_with_include_files
FAILED tests/integration/test_model.py::test_attach_resource - asyncio.except...
FAILED tests/integration/test_application.py::test_app_relation_destroy_block_until_done

[james-garner-canonical]

This test fails 100% of the time when running integration tests on main 20 times. I'm definitely in favour of disabling it.

Do you prefer xfail to skip here? skip is what's been used for many other tests in this repo, and has the advantage(?) of at least making the integration tests run faster.

[dimaqq]

Closing in favour of more comprehensive set.