evolvets argument compatibility

[molpopgen]

After merging #647, we need to make sure that various arguments are properly set. This issue tracks this. We likely need more tests and runtime exceptions.

Resetters and suppress_table_indexing. If a resetter is used, this argument must be False. This has been shown to be not necessary. Can revisit later if it bites us. ;)

• Tracking mutation counts, neutral mutations, and the simplification interval. If 1 and 2, then 3 must be 1.
• Ensure that table indexes are empty (during the simulation) if supress_table_indexing is True.
• Ensure that table indexes are empty for any generations where simplification does not happen, even if suppress_table_indexing is False.