Create templates tests/e2e/sample-applications

[mateusoliveira43]

To avoid duplication, we need to create OpenShift Templates for tests/e2e/sample-applications. This will also make it easier to create the applications for manual tests

Example

Today, developer must run two command to deploy an application, one to create application's PVCs (https://github.com/openshift/oadp-operator/blob/master/tests/e2e/sample-applications/mysql-persistent/pvc-twoVol/aws.yaml) and other for the other objects (https://github.com/openshift/oadp-operator/blob/master/tests/e2e/sample-applications/mysql-persistent/mysql-persistent-twovol-csi.yaml). And if developer want to use an different storageClassName, it need to manually edit the YAML files.

With OpenShift Template, it easy to create all object at once and easy modify its parameters. Example https://github.com/migtools/oadp-non-admin/blob/master/hack/samples/apps/mysql.yaml

Failed approach

Tried in #1364, but approach would make developers running it harder (they would need to change replace strings manually).

[openshift-bot]

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[kaovilai]

Also would like sample apps to remain compatible with pure kube so that other platforms could be tested.