[18.0-fr5] Skip the failing ParallelDeploymentsTest

[openshift-cherrypick-robot]

This is an automated cherry-pick of #653

/assign rabi

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: openshift-cherrypick-robot, rabi

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[centosinfra-prod-github-app]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/b063b74d3da64796b0cbdc664eb037b4

❌ openstack-k8s-operators-content-provider FAILURE in 4m 09s
⚠️ heat-operator-tempest-multinode SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider

[rabi]

2026-05-20 06:18:57.029511 | controller | Wednesday 20 May 2026  06:18:57 +0000 (0:00:00.027)       0:00:16.643 *********
2026-05-20 06:18:57.029519 | controller | Wednesday 20 May 2026  06:18:57 +0000 (0:00:00.027)       0:00:16.642 *********
2026-05-20 06:19:04.996075 | controller | task path: /home/zuul/src/github.com/openstack-k8s-operators/ci-framework/roles/ci_setup/tasks/packages.yml:9
2026-05-20 06:19:04.996198 | controller | fatal: [localhost]: FAILED! =>
2026-05-20 06:19:04.996204 | controller |     changed: false
2026-05-20 06:19:04.996208 | controller |     msg: 'Failed to download metadata for repo ''repo-setup-centos-appstream'': Yum repo
2026-05-20 06:19:04.996212 | controller |       downloading error: Downloading error(s): repodata/5dd4d7779adbe765b9bc7ec215d07577d295d1084047f007a87ef195ebcb4785-primary.xml.gz
2026-05-20 06:19:04.996216 | controller |       - Cannot download, all mirrors were already tried without success; repodata/2a2fb7ac4084b4087a200eae973915f83bcede1e515c7e768ba1ed26d4b8b6eb-filelists.xml.gz
2026-05-20 06:19:04.996221 | controller |       - Cannot download, all mirrors were already tried without success; repodata/984f28b43ce993408594f5cfecb6ced19160d9862204e46a5b1b398ea9cad2c1-modules.yaml.xz
2026-05-20 06:19:04.996225 | controller |       - Cannot download, all mirrors were already tried without success'
2026-05-20 06:19:04.996228 | controller |     rc: 1

[rabi]

recheck

[centosinfra-prod-github-app]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/3614cb9bb95a46a693b3275a49260ec1

❌ openstack-k8s-operators-content-provider FAILURE in 4m 12s
⚠️ heat-operator-tempest-multinode SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider

[rabi]

recheck