Upgrade to TensorFlow 2.18.0+ and Python 3.12, add TensorFlow support to pipeline models

[jetkan-yk]

Description

Upgrade to TensorFlow 2.18.0+ and Python 3.12, add TensorFlow support to pipeline models. Fixes: #326

Motivation and Context

This PR adds TensorFlow support to pipeline models and upgrades the TensorFlow version to 2.18.0+, which relaxes the Python version to 3.12. As discussed in #326 this is a breaking change because TensorFlow >=2.18 requires Keras 3 while TensorFlow < 2.18 requires Keras 2 with a different set of Keras APIs.

If the user wishes to run older versions of TensorFlow, they should run it as a pipeline and implement the predict function to call the appropriate Keras API, e.g. line 31 below:

aiverify/stock-plugins/user_defined_files/pipeline/sample_fashion_mnist_tensorflow/fashionCustomClass.py

Lines 22 to 34 in 906738c

	def predict(self, image_paths: Iterable[str]) -> np.ndarray:
	processed_images = []
	for img_path in image_paths:
	img = tf.keras.utils.load_img(img_path, target_size=(28, 28), color_mode="grayscale")
	img_array = tf.keras.utils.img_to_array(img)
	img_array /= 255.0
	processed_images.append(img_array)
	image_batch = np.stack(processed_images, axis=0)
	predictions = self.model.predict(image_batch)
	predicted_classes = np.argmax(predictions, axis=1)
	return predicted_classes

Type of Change

• feat: A new feature

How to Test

Tested:

• Complete unit tests with Python 3.10 (without aiverify-apigw)
• Complete unit tests with Python 3.11
• Complete unit tests with Python 3.12
• End-to-end tests with aiverify-portal

Note:

1. aiverify-apigw requires Python>=3.11 therefore is not tested in Python 3.10
2. One test in aiverify-test-engine/tests/io/test_tensorflowpipeline.py is failing because the required asset is not available until this PR is merged into main branch

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[imda-peckyoke]

As this is a breaking change, we may need to bump up the aiverify-test-engine as major release, e.g. v2.1.0. Also requires QA to tests through all the plugins with algorithms. @imda-benedictlee @HanFai-IMDA

[jetkan-yk]

As this is a breaking change, we may need to bump up the aiverify-test-engine as major release, e.g. v2.1.0. Also requires QA to tests through all the plugins with algorithms. @imda-benedictlee @HanFai-IMDA

Done

[imda-benedictlee]

Technical Test Working in UI: