gafferpy seed matching backwards compatibility

[t92549]

Gaffer 2 removed seed matching, but gafferpy could retain backwards compatibility with existing scripts by adding this back and translating the json to use Views instead.

[t92549]

This could be done with **kwargs and the Operation base class

[t92549]

SeedMatching was only used in GetElements and GetElementsBetweenSets so it could also be used in just those

[t92549]

This can only be done in operations when there is no View provided and when the user provides elements rather than seeds. This is because the group is needed to put into the View.