Correct Generation 7 modifier order per OZY's research

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From a cursory glance, the conditions for checking if a modifier should be applied is correct; it's moreso the order. The listed modifiers (BP, Attack, Defense, final modifiers, general damage modifiers), are taken from OZY's research, which is considered to be the authoritative research for Gen 7 and is what the simulator itself is using (or minimally should be using).

Originally posted by @DaWoblefet on Smogon

This may require copying calc/src/mechanics/gen7.ts to calc/src/mechanics/gen6.ts and redoing gen7.ts with the new changes, though a way which shares more code would probably be worth investigation.

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Relevant: jake-white/VGC-Damage-Calculator@830bd17