Temporarily exclude jira-plugin from `test_integration_doc_endpoints`,
until the doc is updated.
The screenshot for this integration is added separately since this
adds a new screenshot for an integration whose doc is in the
python-zulip-api repo.
Since this breaks the sync between the docs and the screenshots, an
exclusion is added to make the tests pass.
This does not include any screenshot configs, just defining the format,
and loading FIXTURELESS_SCREENSHOT_CONFIG from the file.
Co-authored-by: Lauryn Menard <lauryn@zulip.com>
