Fix(serializer): skip building callbacks that are already instantiated (

#1390)

* Fix(serializer): skip building callbacks that are already instantiated

* Fix(serializer): formatting

* Do not serializer.load_params_from_definition in sk_params

* Fix tests

* Fix trivy scan script

* Revert "Fix tests"

This reverts commit dbd0a60.

* Revert "Do not serializer.load_params_from_definition in sk_params"

This reverts commit 65c290c.

* Revert "Fix trivy scan script"

This reverts commit bd0f4fe.

---------

Co-authored-by: Serhii Koropets <[email protected]>

gordo/serializer/from_definition.py

@@ -5,6 +5,8 @@
 import typing  # noqa
 
 from typing import Union, Dict, Any, Iterable
+
+from keras.src.callbacks import Callback
 from sklearn.pipeline import Pipeline, FeatureUnion
 from sklearn.base import BaseEstimator
 from tensorflow.keras import Sequential
@@ -365,5 +367,7 @@ def build_callbacks(definitions: list):
     """
     callbacks = []
     for callback in definitions:
-        callbacks.append(_build_step(callback))
+        callbacks.append(
+            callback if isinstance(callback, Callback) else _build_step(callback)
+        )
     return callbacks