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/fwgdb.py b/scripts/fwgdb.py
index 2684b06..47c17d8 100644
--- a/scripts/fwgdb.py
+++ b/scripts/fwgdb.py
@@ -6,17 +6,19 @@
 
 import errno
 import glob
+import logging
 import os
 import re
 import socket
 import time
 
+from chromite.third_party.pyelftools.elftools.elf.elffile import ELFFile
+
 from chromite.lib import build_target_lib
 from chromite.lib import constants
 from chromite.lib import cros_build_lib
-from chromite.lib import cros_logging as logging
 from chromite.lib import timeout_util
-from chromite.third_party.pyelftools.elftools.elf.elffile import ELFFile
+
 
 # Need to do this before Servo import
 cros_build_lib.AssertInsideChroot()
@@ -25,6 +27,8 @@
 from servo import client
 from servo import servo_parsing
 from servo import terminal_freezer
+
+
 # pylint: enable=import-error,wrong-import-position