[Tempest][Tobiko] clouds.yaml mounted on the proper path

[eduolivares]

When either a tempest or a tobiko container is run, the clouds.yaml file could be mounted directly on its proper path
$HOME/.config/openstack/clouds.yaml (new behavior implemented in ci-framework) or on the external_files directory (legacy behavior).

Related-PR: openstack-k8s-operators/ci-framework#1057

OSPRH-1670

[openshift-ci]

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[softwarefactory-project-zuul]

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://review.rdoproject.org/zuul/buildset/8a46166d9ff8479f98d9e6f2cc714149

✔️ tcib-build-containers SUCCESS in 2h 04m 06s
❌ tcib-crc-podified-edpm-baremetal FAILURE in 1h 23m 55s
❌ tcib-podified-multinode-edpm-deployment-crc FAILURE in 24m 37s

[eduolivares]

recheck