Automatic merge from submit-queue (batch tested with PRs 54437, 54714, 54720). 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>.
Adds support for v4/v6 loopback dns bind address.
**What this PR does / why we need it**:
Previously, IPv4 Loopback addresses (127.0.0.1) were hard coded into the kubeadm dns deployment manifest. This PR adds support for using an IPv6 Loopback (::1) when the kube-dns Service IP is an IPv6 address.
**Special notes for your reviewer**:
Required for IPv6-only deployments.
**Release note**:
```NONE
```
/area ipv6
/sig network
Automatic merge from submit-queue. 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>..
bazel: build/test almost everything
**What this PR does / why we need it**: Miscellaneous cleanups and bug fixes. The main motivating idea here was to make `bazel build //...` and `bazel test //...` mostly work. (There's a few reasons these still don't work, but we're a lot closer.)
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/assign @BenTheElder @mikedanese @spxtr
