Initial e2e scaffolding code based on go test framework

[ShyamsundarR]

Some quick notes on usage and abilities:

$ cd e2e

• Run all e2e$ go test -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml

2024-04-16T07:37:40.108-0400    INFO    e2e/main_test.go:139    TestSuites
2024-04-16T07:37:40.108-0400    INFO    e2e/basic_suite.go:11   TestSuites/Basic
2024-04-16T07:37:40.108-0400    INFO    e2e/basic_suite.go:22   TestSuites/Basic/Deploy
2024-04-16T07:37:40.108-0400    INFO    e2e/basic_suite.go:26   TestSuites/Basic/Enable
2024-04-16T07:37:40.108-0400    INFO    e2e/basic_suite.go:30   TestSuites/Basic/Failover
...
2024-04-16T07:37:40.109-0400    INFO    e2e/basic_suite.go:38   TestSuites/Exhaustive/DaemonSet#02/Imperative/Disable
2024-04-16T07:37:40.109-0400    INFO    e2e/basic_suite.go:42   TestSuites/Exhaustive/DaemonSet#02/Imperative/Undeploy
PASS
ok      github.com/ramendr/ramen/e2e    0.012s

• Run a specific suite

e2e$ go test -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml -run 'TestSuites/Validate'

2024-04-16T07:40:35.758-0400    INFO    e2e/main_test.go:139    TestSuites
2024-04-16T07:40:35.758-0400    INFO    e2e/validation_suite.go:11  TestSuites/Validate
2024-04-16T07:40:35.758-0400    INFO    e2e/validation_suite.go:19  TestSuites/Validate/RamenHub
2024-04-16T07:40:35.758-0400    INFO    e2e/validation_suite.go:23  TestSuites/Validate/RamenSpokes
2024-04-16T07:40:35.758-0400    INFO    e2e/validation_suite.go:27  TestSuites/Validate/Ceph
PASS
ok      github.com/ramendr/ramen/e2e    0.010s

• Run step by step

e2e$ go test -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml -run 'TestSuites/Basic/Deploy

e2e$ go test -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml -run 'TestSuites/Basic/Failover

e2e$ go test -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml -run 'TestSuites/Basic/Enable

• Build test binary to run

e2e$ go test -c -o e2e

e2e$ ./e2e -kubeconfig-c1 ~/kc.yaml -kubeconfig-c2 ~/kc.yaml -kubeconfig-hub ~/kc.yaml -test.run 'TestSuites/Basic/Enable'