Extend GetKubeconfig methods with args

[mjudeikis]

What type of PR is this?

/kind feature

What this PR does / why we need it:

When dealing with multi-cluster setup we ran into issue where we need to pass arguments into GetKubeconfig method.
Specific example in our case was --internal to kind so cluster can speak to different clusters.

This extends this so you can do things like:

internalKubeConfigOpts := kind.WithGetKubeConfigArgs("--internal")
		internalKubeConfig, err := kindEdgeCluster.WithOpts(internalKubeConfigOpts).GetLiveKubeconfig()
		if err != nil {
			log.Printf("Failed to get edge cluster kubeconfig: %s", err)
			return ctx, err
		}
		installCmd := fmt.Sprintf(
			`bash -c "KUBECONFIG=%s kubectl create secret generic edge-cluster-kubeconfig -n omni-operator-system  --from-file=kubeconfig=%s"`,
			kindMasterCluster.GetKubeconfig(),
			internalKubeConfig,
		)

Or similar pattern if you want to set this for all cluster object.
In addition to allow networking we did this:

os.Setenv("KIND_EXPERIMENTAL_DOCKER_NETWORK", "kind-test")
	testEnv.Setup(
		envfuncs.CreateCluster(kindMasterCluster, kindMasterClusterName),
		envfuncs.CreateNamespace(namespace),
		setupFunc,
		installDepsFunc,
		generateAndDeployFunc,
		envfuncs.CreateClusterWithConfig(kindEdgeCluster, kindEdgeClusterName, "edge-kind.yaml"), // must be after master cluster setup.
		joinMasterClusterPrerequisitesFunc,
	)

Im not super exited about naming of GetLiveKubeconfig so any suggestions are welcome

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., Usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mjudeikis
Once this PR has been reviewed and has the lgtm label, please assign harshanarayana for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[mjudeikis]

/retest

[k8s-ci-robot]

@mjudeikis: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-e2e-framework-test	e5f5248	link	true	/test pull-e2e-framework-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[mjudeikis]

failure somehow does not look related ?

[k8s-ci-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.