Add group_vars symlink to hooks/playbooks

[amartyasinha]

Since vars are being moved to group_vars, and playbooks in hooks are currently executed through ansible-playbook command, let's add group_vars there to ensure ansible finds and loads group_vars during hooks execution.

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[softwarefactory-project-zuul]

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https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/ee967fe2ba414a278cc1cfc92c3b05d4

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 51m 12s
❌ podified-multinode-edpm-deployment-crc FAILURE in 37m 24s
❌ cifmw-crc-podified-edpm-baremetal FAILURE in 43m 12s
❌ cifmw-crc-podified-edpm-baremetal-minor-update FAILURE in 1h 33m 09s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 13s
✔️ cifmw-pod-pre-commit SUCCESS in 8m 14s
✔️ build-push-container-cifmw-client SUCCESS in 16m 41s

[amartyasinha]

recheck