Add make check-testdata to the prow CI

[camilamacedo86]

This task is for we add in the prow the test which checks if the testdata is updated. The reason for that is avoid broke the CI for the master branch. Following a scenario as an example.

The mod kubebuilder-declarative-pattern is added when the testdata add-on project is gen, if it changes after the PR be pushed and the CI finished then, the boot will merge the PR in the master because it will just re-run the prow tests. However, the make check-testdata for the master branch will be executed after the merge and will fail.

Notes

• Check the contribution.md to have further information and be able to add this test in the prow.

[camilamacedo86]

c/c @mengqiy @alexeldeib