CompareWithFixture will compare output with a test fixture and allows to automatically update them by setting the UPDATE env var.

MarshalYamlAndDiff diffs the yaml representation of two runtime.Objects, useful for getting a human-readable diff for bigger objects.

MatchExpected ensures that `cmp.Diff(actual, expected)` returns nothing.

RuntimeObjectIgnoreRvTypeMeta compares two kubernetes objects, ignoring their resource version and TypeMeta.