[ENH] Implemented parallel algorithm for MASS

[Ramana-Raja]

Reference Issues/PRs

#2714

What does this implement/fix? Explain your changes.

Implemented parallel algorithm for MASS, using parallel in njit for _squared_distance_profile and _normalized_squared_distance_profile

Does your contribution introduce a new dependency? If yes, which one?

no

Any other comments?

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[baraline]

Hi, this does not solve the original issue. Adding prange and parallel=True does not work as the sliding window algorithm used by MASS uses previously computed value (i uses i-1) which you cannot guarantee will exist with this approach. The original issue referenced a code that should be ported into aeon. Please refer to this implementation.