Add IBM Cloud into provider list of capi

[jichenjc]

/kind feature
/area provider/ibmcloud

Describe the solution you'd like
[A clear and concise description of what you want to happen.]

https://github.com/kubernetes-sigs/cluster-api/blob/master/cmd/clusterctl/client/config/providers_client.go#L34

need add ibmcloud into here.. tracking

Provider contract:
https://cluster-api.sigs.k8s.io/clusterctl/provider-contract.html

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

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/lifecycle stale

[spzala]

/remove-lifecycle stale