🐛 Revert accidental update to previous API templates

[mdbooth]

https://github.com/kubernetes-sigs/cluster-api-provider-openstack/pull/1959 accidentally updated the bastion spec for the v1alpha6 and v1alpha7 tests, which breaks the upgrade test.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[mdbooth]

/test pull-cluster-api-provider-openstack-e2e-full-test

[dulek]

/lgtm

My bad, thank you Matt!

[mdbooth]

Until we've seen the upgrade test pass.

/hold

[mdbooth]

/hold cancel