Automatic merge from submit-queue

[Federation][init-11.2] use USE_KUBEFED env var to choose bw old and new federation deployment

This is continuation of #35961
USE_KUBEFED variable is used for deploying federation control plane. if not defined, federation will be brought up using old method i.e scripts.

Have verified that federation comes up using the old method, using following steps
```
$ export FEDERATION=true
$ export E2E_ZONES="asia-east1-c"
$ export FEDERATION_PUSH_REPO_BASE=gcr.io/<my-project>
$ KUBE_RELEASE_RUN_TESTS=n KUBE_FASTBUILD=true go run hack/e2e.go -v -build
$ build-tools/push-federation-images.sh
$ go run hack/e2e.go -v --up
```
Should merge #35961 before this PR

@madhusudancs