cbuildbot: Move Buildbot printing functions to `cbuildbot_alerts` module

Move all of the cbuildbot-specific printing routines out of cros_logging
and in to a new submodule of cbuildbot. Fix up all usages of these
functions to point to the new location.

BUG=b:191490453
TEST=`run_tests`

Change-Id: I5f5f28256b89d2b0500c1c404e2718f33aceaa31
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2973409
Tested-by: Chris McDonald <cjmcdonald@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/cros_sdk.py b/scripts/cros_sdk.py
index 49db71c..286354d 100644
--- a/scripts/cros_sdk.py
+++ b/scripts/cros_sdk.py
@@ -13,6 +13,7 @@
 
 import argparse
 import glob
+import logging
 import os
 from pathlib import Path
 import pwd
@@ -23,10 +24,10 @@
 import sys
 import urllib.parse
 
-from chromite.lib import constants
+from chromite.cbuildbot import cbuildbot_alerts
 from chromite.lib import commandline
+from chromite.lib import constants
 from chromite.lib import cros_build_lib
-from chromite.lib import cros_logging as logging
 from chromite.lib import cros_sdk_lib
 from chromite.lib import locking
 from chromite.lib import namespaces
@@ -1109,7 +1110,7 @@
   else:
     sdk_version = options.sdk_version
   if options.buildbot_log_version:
-    logging.PrintBuildbotStepText(sdk_version)
+    cbuildbot_alerts.PrintBuildbotStepText(sdk_version)
 
   # Based on selections, determine the tarball to fetch.
   if options.download: