cli: Excise `cros_logging` module

Remove all usages of `cros_logging` in chromite/cli 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

Update isort.cfg to allow imports from the `abc` and `collections.abc`
modules to be on a single line.

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.

BUG=b:191490453
TEST=`run_tests`

Change-Id: I548b33864f4ab9e12fe2b0d57aa24747d0bd5827
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3044339
Tested-by: Chris McDonald <cjmcdonald@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
diff --git a/cli/flash_unittest.py b/cli/flash_unittest.py
index 4e9d54a..bda42fa 100644
--- a/cli/flash_unittest.py
+++ b/cli/flash_unittest.py
@@ -4,13 +4,13 @@
 
 """Unit tests for the flash module."""
 
+import logging
 import os
 from unittest import mock
 
 from chromite.cli import flash
 from chromite.lib import commandline
 from chromite.lib import cros_build_lib
-from chromite.lib import cros_logging as logging
 from chromite.lib import cros_test_lib
 from chromite.lib import dev_server_wrapper
 from chromite.lib import osutils