Update base_image to //kube/basealpine:basealpine for autoroll

Bug: b/487275245
Change-Id: Ie674020403323be4880c524d4cde89378e675eae
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/1195301
Auto-Submit: Eric Boren <borenet@google.com>
Reviewed-by: Kaylee Lubick <kjlubick@google.com>
Commit-Queue: Eric Boren <borenet@google.com>

Author: erock2112

autoroll/BUILD.bazel

@@ -3,7 +3,7 @@ load("//bazel:skia_app_container.bzl", "skia_app_container")
 
 skia_app_container(
     name = "autoroll_google3_container",
-    base_image = "@basealpine",
+    base_image = "//kube/basealpine:basealpine",
     dirs = {
         "/usr/local/bin": [
             [
@@ -51,7 +51,7 @@ skia_app_container(
 
 skia_app_container(
     name = "autoroll_fe_container",
-    base_image = "@basealpine",
+    base_image = "//kube/basealpine:basealpine",
     dirs = {
         "/usr/local/bin": [
             [