bump cluster-api from to 1.2.1

[mkumatag]

/kind cleanup
/area provider/ibmcloud

What steps did you take and what happened:
New tag is created here - https://github.com/kubernetes-sigs/cluster-api/releases/tag/v1.2.1 but release is yet to be created, once we have release created and the images pushed lets update the version to 1.2.1 wherever required.

What did you expect to happen:

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Cluster-api version:
• Minikube/KIND version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):