Run integrations build as root (#2654)

For some reason https://github.com/google/iree/pull/2566 made the
integrations build run three times as long. Reverting until we can
figure out the root cause.

See https://github.com/google/iree/issues/2653

Confirmed presubmits now take 20 minutes

build_tools/kokoro/gcp_ubuntu/bazel/linux/x86/integrations/build_kokoro.sh

diff --git a/build_tools/kokoro/gcp_ubuntu/bazel/linux/x86/integrations/build_kokoro.sh b/build_tools/kokoro/gcp_ubuntu/bazel/linux/x86/integrations/build_kokoro.sh
index c35d897..19af965 100755
--- a/build_tools/kokoro/gcp_ubuntu/bazel/linux/x86/integrations/build_kokoro.sh
+++ b/build_tools/kokoro/gcp_ubuntu/bazel/linux/x86/integrations/build_kokoro.sh
@@ -26,10 +26,16 @@
 # Print the UTC time when set -x is on
 export PS4='[$(date -u "+%T %Z")] '
 
-source "${KOKORO_ARTIFACTS_DIR?}/github/iree/build_tools/kokoro/gcp_ubuntu/docker_common.sh"
+WORKDIR="${KOKORO_ARTIFACTS_DIR?}/github/iree"
 
-# Sets DOCKER_RUN_ARGS
-docker_setup
+# TODO(#2653): Don't run docker as root
+DOCKER_RUN_ARGS=(
+      # Make the source repository available
+      --volume="${WORKDIR?}:${WORKDIR?}"
+      --workdir="${WORKDIR?}"
+      # Delete the container after
+      --rm
+)
 
 docker run "${DOCKER_RUN_ARGS[@]?}" \
   gcr.io/iree-oss/bazel-tensorflow:prod \
@@ -37,7 +43,8 @@
 
 # Kokoro will rsync this entire directory back to the executor orchestrating the
 # build which takes forever and is totally useless.
-rm -rf "${KOKORO_ARTIFACTS_DIR?}"/*
+# TODO(#2653): Remove sudo when docker doesn't run as root
+sudo rm -rf "${KOKORO_ARTIFACTS_DIR?}"/*
 
 # Print out artifacts dir contents after deleting them as a coherence check.
 ls -1a "${KOKORO_ARTIFACTS_DIR?}/"