add configmaps derived from file and dir

[sosan]

What type of PR is this?

/kind feature

What this PR does / why we need it:

added configmaps derived from files and directories,
added tests and e2e, and created a function isconfigfile to check if we need to use a configmap and mount as readonly
I also noticed that readonly mount is not assigned because it cause the e2e tests to fail

Which issue(s) this PR fixes:

Fixes #1794

Special notes for your reviewer:

// return useconfigmap and readonly,
// not used asigned readonly because dont break e2e
useConfigMap, _ = isConfigFile(volume.Host)

setVolumeAccessMode added more access modes
previous:

if mode == "ro" {
		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadOnlyMany}
	} else {
		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
	}

[cdrage]

/lgtm

[cdrage]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cdrage, sosan

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