api: Excise `cros_logging` module

Remove all usages of `cros_logging` in chromite/api 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.

BUG=b:191490453
TEST=`run_tests`

Change-Id: I9336b714bea49ed3d1c7902f7069eb2bbd292e33
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3043697
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/api/router.py b/api/router.py
index 90235c9..a5c0e13 100644
--- a/api/router.py
+++ b/api/router.py
@@ -10,6 +10,7 @@
 
 import collections
 import importlib
+import logging
 import os
 
 from chromite.third_party.google.protobuf import symbol_database
@@ -31,7 +32,6 @@
 from chromite.api.gen.chromite.api import test_pb2
 from chromite.api.gen.chromite.api import toolchain_pb2
 from chromite.lib import cros_build_lib
-from chromite.lib import cros_logging as logging
 from chromite.lib import osutils
 from chromite.utils import memoize