Remove KOLLA_COPY_STRATEGY as COPY_ALWAYS is the default now

[mrkisaolamb]

Closes #707

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[SeanMooney]

we cant do this until we update tcib

https://github.com/openstack-k8s-operators/tcib/blob/main/container-images/kolla/base/set_configs.py#L371-L386

they did not follow kolla lead in the fork.

we still need to set this today.

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
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https://review.rdoproject.org/zuul/buildset/839c837f37d54d179523ee89eda3e47c

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 41m 30s
❌ nova-operator-kuttl FAILURE in 50m 15s
❌ nova-operator-tempest-multinode FAILURE in 1h 16m 01s
❌ nova-operator-tempest-multinode-ceph FAILURE in 1h 16m 12s