[ENH] Add KDTW kernel to be used with kernelKmeans algorithm for time series clustering

[boujida-h]

Describe the feature or idea you want to propose

The algorithm TimeSeriesKernelKMeans in the API reference for clustering does not take KDTW**, A Regularized Dynamic Time Warping Kernel, as a kernel.

** : https://github.com/pfmarteau/KDTW/tree/master

Describe your proposed solution

Integrate the KDTW given above in https://www.aeon-toolkit.org/en/stable/api_reference/auto_generated/aeon.clustering.TimeSeriesKernelKMeans.html#aeon.clustering.TimeSeriesKernelKMeans

The kernelKmeans algorithm must use the KDTW as a kernel.

[TonyBagnall]

great idea, @chrisholder is on it