[MNT] Update similarity search with new base classes

[baraline]

Reference Issues/PRs

Fixes #1243.

What does this implement/fix? Explain your changes.

• Remake similarity search module to use Series and Collection base classes
• Add "fastest" option for distance speedup selection
• Rename "ConvolveDotProduct" speedup to "Mueen" for Euclidean distance.

Remaining TODOs:

• Make a SimilaritySearchBroadcaster to use BaseSeriesSimialritySearch with collections
• Check Docstrings have been correctly updated
• Update documentation and example notebooks

[aeon-actions-bot]

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I would have added the following labels to this PR based on the changes made: [ $\color{#006b75}{\textsf{similarity search}}$ ], however some package labels are already present.

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