To correctly update k8s dependencies we have to first bump all replace directives of k8s.io/* in
Then (if necessary) delete generated code that potentially references deprecated or eliminated stuff (like the mock client) and, on cascade, fix the files[1] that include these (remember which files are affected because at the end you will have to revert the changes you made to restore them).
Delete generated code is not a problem because it will be regenerated.
Run make deps-update to update dependencies.
Run make && make generate to regenerate the code.
Don't forget to restore the files edited in [1].