`make build_deps` Makefile rule is broken currently

Issue tracking current broken fucntionality where the `make build_deps` Makefile errors and does not complete:

```
aprindle@aprindle-ssd ~/skaffold [change-skaffold-base-image]$ make build_deps
docker build \
-f deploy/skaffold/Dockerfile.deps \
-t gcr.io/k8s-skaffold/build_deps:e59cdd462a32d45baaef5f591fde6980a5400d69 \
deploy/skaffold
Sending build context to Docker daemon 36.86kB
Step 1/94 : ARG ARCH=amd64
Step 2/94 : FROM alpine:3.10 as download-kubectl
---> e7b300aee9f9
Step 3/94 : ARG ARCH
---> Using cache
---> 7638b099e0fe
Step 4/94 : ENV KUBECTL_VERSION v1.23.13
---> Using cache
---> a5e7afeff6fb
Step 5/94 : ENV KUBECTL_URL https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/${ARCH}/kubectl
---> Using cache
---> 05ceaf581f56
Step 6/94 : COPY deploy/skaffold/digests/kubectl.${ARCH}.sha512 .
COPY failed: file not found in build context or excluded by .dockerignore: stat deploy/skaffold/digests/kubectl.amd64.sha512: file does not exist
make: *** [Makefile:207: build_deps] Error 1
```