validate tests: Use golden yaml reports

[nirs]

validate/application and validate/clsuters tests use huge ApplicationStatus and ClustersStatus expected structs. Convert them to golden yaml files to make it easier to maintain the tests.

Example structs:

• ramenctl/pkg/validate/clusters/command_test.go

  Line 68 in 9c163f5

  expected := &report.ClustersStatus{

  (550 lines)

• ramenctl/pkg/validate/application/command_test.go

  Line 115 in 9c163f5

  expectedStatus := &report.ApplicationStatus{

  (186 lines)

The yaml output will be less less than half the size and easier to edit.

The values come from resources in pkg/testdata/. When we update the resources we need to update the golden files.