Create vendor->staging symlinks in kubernetes-src.tar.gz

build/release-tars/BUILD

@@ -11,6 +11,7 @@ load(
 )
 load("@io_k8s_repo_infra//defs:build.bzl", "release_filegroup")
 load("@io_k8s_repo_infra//defs:pkg.bzl", "pkg_tar")
+load("//staging:repos_generated.bzl", "staging_repos")
 
 # Bazel doesn't make the output filename
 # (such as kubernetes-server-{OS}-{ARCH}.tar.gz) configurable, so we instead
@@ -87,6 +88,10 @@ pkg_tar(
         ":package_src": "//",
         "//conditions:default": ".",
     }),
+    symlinks = {
+        "kubernetes/vendor/%s" % repo: "../../staging/src/%s" % repo
+        for repo in staging_repos
+    },
     tags = [
         "manual",
         "no-cache",