etcd: use shorter workspace name

The previous workspace format name corresponds to the import style used
by gazelle, but this particular etcd dependency isn't appropriate for
use in imports. Since rook is going to require an appropriate etcd
dependency, change this dependency to use a different name that won't
conflict with the importable one.

platform/etcd/BUILD.bazel

@@ -12,7 +12,7 @@ load("//bazel:package.bzl", "homeworld_deb")
 go_binary(
     name = "etcd",
     embed = [
-        "@com_github_coreos_etcd//:go_default_library",
+        "@etcd//:go_default_library",
     ],
     #    gc_linkopts = "${GO_LDFLAGS}",
     pure = "on",
@@ -22,7 +22,7 @@ go_binary(
 go_binary(
     name = "etcdctl",
     embed = [
-        "@com_github_coreos_etcd//etcdctl:go_default_library",
+        "@etcd//etcdctl:go_default_library",
     ],
     #    gc_linkopts = "${GO_LDFLAGS}",
     pure = "on",

platform/etcd/deps.bzl

@@ -2,7 +2,7 @@ load("@bazel_gazelle//:deps.bzl", "go_repository")
 
 def etcd_dependencies():
     go_repository(
-        name = "com_github_coreos_etcd",
+        name = "etcd",
         commit = "d57e8b8d97adfc4a6c224fe116714bf1a1f3beb9",  # 3.3.12
         importpath = "github.com/coreos/etcd",
         build_external = "vendored",