cros_build_lib: switch compression types to an enum

BUG=None
TEST=CQ passes

Change-Id: I980c0cd2ddcddc8a60f878121bd901ad43e44dbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3602569
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
diff --git a/scripts/deploy_chrome.py b/scripts/deploy_chrome.py
index 40aaaa6..e99558f 100644
--- a/scripts/deploy_chrome.py
+++ b/scripts/deploy_chrome.py
@@ -1087,7 +1087,7 @@
     cros_build_lib.CreateTarball(
         staging_tarball_path,
         staging_dir,
-        compression=cros_build_lib.COMP_ZSTD,
+        compression=cros_build_lib.CompressionType.ZSTD,
         extra_env={"ZSTD_CLEVEL": "9"},
     )
     logging.info(