Future-proof the location of unsupported decomposer frequencies

[eccabay]

we might want to move [unsupported decomposer frequencies] either 1.) into the stl_decomposer module and/or 2.) make it returnable by the decomposer itself. Then we can dynamically know what decomposers support or do not. You could also build the parametrization list and parametrize across STL decomposers in your decomposer test that way.

Part of the motivation behind the move, in my mind, is the answer to "where should I go to find what frequencies are not supported by X Decomposer?"

Originally posted by @chukarsten in https://github.com/alteryx/evalml/pull/3794#discussion_r1008425041