Setup the prerequisites for running the unit tests

[mkumatag]

/kind bug
/area provider/ibmcloud

What steps did you take and what happened:
Hitting with following error while running the make test, which needs to be fixed by installing/configuring required prereqs as part of prereqs in the make file itself

Failure [0.040 seconds]
[BeforeSuite] BeforeSuite 
/Users/manjunath/clusterapi_ws/src/sigs.k8s.io/cluster-api-provider-ibmcloud/cloud/scope/suite_test.go:43

  Unexpected error:
      <*fmt.wrapError | 0xc000834080>: {
          msg: "unable to start control plane itself: failed to start the controlplane. retried 5 times: fork/exec /usr/local/kubebuilder/bin/etcd: no such file or directory",
          err: <*fmt.wrapError | 0xc000834060>{
              msg: "failed to start the controlplane. retried 5 times: fork/exec /usr/local/kubebuilder/bin/etcd: no such file or directory",
              err: <*fs.PathError | 0xc0000ae600>{
                  Op: "fork/exec",
                  Path: "/usr/local/kubebuilder/bin/etcd",
                  Err: <syscall.Errno>0x2,
              },
          },
      }
      unable to start control plane itself: failed to start the controlplane. retried 5 times: fork/exec /usr/local/kubebuilder/bin/etcd: no such file or directory
  occurred

  /Users/manjunath/clusterapi_ws/src/sigs.k8s.io/cluster-api-provider-ibmcloud/cloud/scope/suite_test.go:53

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):

[mkumatag]

/assign @Amulyam24

[mkumatag]

workaround for this issue:

# set the KUBEBUILDER_ASSETS environment with proper directory which contains apiserver, etcd
$ KUBEBUILDER_ASSETS="/Users/manjunath/Library/Application Support/io.kubebuilder.envtest/k8s/1.23.3-darwin-amd64" make test