Automatic merge from submit-queue (batch tested with PRs 61546, 61038, 61575, 60779, 61496). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

prune Bazel build files from imported go deps and update to gazelle 0.10.1

**What this PR does / why we need it**: updates the `hack/godep-save.sh` script to prune any imported `BUILD`, `BUILD.bazel`, or `WORKSPACE` files.

We assume anything imported through godep doesn't need Bazel, but a Bazel-enabled Go project may include `BUILD` files with missing dependencies not imported by godep. To prevent this from breaking the Bazel build, remove these. (Gazelle will then regenerate the `BUILD` files based on the go build metadata.)
 
Additionally, there seems to be a bug in gazelle where it follows the `vendor/k8s.io` staging symlinks only when run through `hack/run-in-gopath.sh`. Updating to gazelle 0.10.1 fixes this bug.

A similar PR was recently merged in kubernetes/test-infra: https://github.com/kubernetes/test-infra/pull/7366

**Release note**:

```release-note
NONE
```

/assign @thockin 
cc @jayconrod