HyperparameterTuner does not accept Pipeline Variable for random_seed argument

[d-vesely]

PySDK Version

• PySDK V2 (2.x)
• PySDK V3 (3.x)

Describe the bug
The HyperparameterTuner class does not accept a Pipeline Variable for the random_seed argument, which is required to be an int. This is a regression in comparison to v2.