[ENH] Adding `load_model` functionality to deep regressor ensembles

[hadifawaz1999]

Describe the feature or idea you want to propose

Similar to what has been proposed in #2436 and solved in #2631 it would be good to do the exact same functionality but for InceptionTimeRegressor and LITETimeRegressor

Describe your proposed solution

Do the exact same as in #2631 but for InceptionTimeRegressor and LITETimeRegressor, the only difference is that the load_model function will not take classes argument as it is a regression task

Describe alternatives you've considered, if relevant

No response

Additional context

No response