libtuning: Migrate prints to python logging framework

In ctt_ccm.py the logging functionality of the Cam object was used. As
we don't want to port over that class, it needs to be replaced anyways.
While at it, also replace the eprint function as it doesn't add any
value over the logging framework and misses the ability for easy log
formatting.

For nice output formatting add the coloredlogs library.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

utils/tuning/libtuning/image.py

@@ -13,6 +13,9 @@ import re
 
 import libtuning as lt
 import libtuning.utils as utils
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class Image:
@@ -25,13 +28,13 @@ class Image:
         try:
             self._load_metadata_exif()
         except Exception as e:
-            utils.eprint(f'Failed to load metadata from {self.path}: {e}')
+            logger.error(f'Failed to load metadata from {self.path}: {e}')
             raise e
 
         try:
             self._read_image_dng()
         except Exception as e:
-            utils.eprint(f'Failed to load image data from {self.path}: {e}')
+            logger.error(f'Failed to load image data from {self.path}: {e}')
             raise e
 
     @property