Add missing commit for (m)atk/(m)def percent implementation and one official behavior fix for BS_OVERTHRUST

[skyleo]

Pull Request Prelude

• I have followed proper Hercules code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

This ensures that ATK/DEF percent is initialized for all bl-types, which it wasn't so it was defaulted to 0, resulting to no damage or 1 damage.

Also implements correct buff for ATK % (not the one of the atk percent behavior, but in general) of BS_OVERTHRUST for party members.

list of commits these are linked to in my private fork, for my own reference:

99f3f988497ad9dbe2143384268eff74fd0dfe14
f356f84d23714dd8c2b5e81301a57769d38cb6e8
d461dec15d97d5572573072073fed236c0ba2877

This PR is a partial followup to #3290

Issues addressed: None.

[skyleo]

Adjusted to respect that Renewal behavior is different. It's still incorrect as it atm, but I can't confirm nor deny renewal behavior atm with proof, and hopefully @guilherme-gm has caught wind of it in his rebalance.

[MishimaHaruna]

The renewal side was altered in 693c4aa so I'll handle the conflict when I merge this into the rebalance branch