Request more disk space for docker image jobs on RBE

(cherry picked from commit d58e430)
(cherry picked from commit 436632f)

Author: HoloRin

packaging/docker-image/BUILD.bazel

@@ -48,6 +48,7 @@ CONVENIENCE_PACKAGES = [
 FIRECRACKER_EXEC_PROPS = {
     # https://www.buildbuddy.io/docs/rbe-microvms
     "workload-isolation-type": "firecracker",
+    "EstimatedFreeDiskBytes": "16GB",
     "init-dockerd": "true",
     "recycle-runner": "true",
     # Use the default buildbuddy RBE image