scripts: Excise `cros_logging` module

Remove all usages of `cros_logging` in chromite/scripts and replace them
with the stdlib `logging` module. The NOTICE level is already provided by
the custom Logger subclass initialized in chromite's top level module __init__.py

This change was made by finding all imports of `cros_logging` and
replacing those usages with stdlib `logging` and then running `isort`
over all modified files.

Additionally wrapper3_unittest was modified to copy chromite's __init__.py
verbatim rather than creating an empty init, because code now depends on
the logger definition coming from that file.

BUG=b:191490453
TEST=`run_tests`

Change-Id: I81879290689e51e9836b9c47ffdd88a5a7a0b4e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3042188
Tested-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/scripts/sysmon/loop.py b/scripts/sysmon/loop.py
index ece318b..9301fc6 100644
--- a/scripts/sysmon/loop.py
+++ b/scripts/sysmon/loop.py
@@ -6,9 +6,9 @@
 
 from __future__ import absolute_import
 
+import logging
 import time
 
-from chromite.lib import cros_logging as logging
 
 logger = logging.getLogger(__name__)