Randomized format team generation updates

[livid-washed]

This implements several changes to team generation.

-Removes the limit of one Pokemon per unique type combination in gens 4-9. (They were removed for gens 2-3 in #10056). This means it is now possible to get, for example, Kyogre and Barraskewda on the same team. Monotype will still have a limit of three Pokemon of a type combination in gens 6-9.
-Implements a limit of four Pokemon weak to Freeze-Dry in gens 6-9. Testing has shown that its effect on team generation is negligible.
-Removes tier limits from gens 5, 6, and 7, since they no longer have Pokemon consistently attaining a winrate over 53%.
-Removes tier limits and the soft type cap from gen 1.

[pyuk-bot]

When I tested a freeze dry limit it added something like 10 times as many teams that had 3 ice weaknesses and no ice resists as it did remove teams that had 5+ freeze dry weaknesses. What did your testing show?

[livid-washed]

When I tested a freeze dry limit it added something like 10 times as many teams that had 3 ice weaknesses and no ice resists as it did remove teams that had 5+ freeze dry weaknesses. What did your testing show?

No noticeable change to the number of teams with 3 ice weaks and no resists. From generating 100k teams before and after adding the freeze dry limit, the number of such teams went up by just 16.