Core/Spells: Implement SPELL_ATTR7_CAN_RESTORE_SECONDARY_POWER

spells without this attribute will no longer energize secondary power.
Druids in cat form will no longer be able to replenish mana from every kind of spell
Merge pull request #12284 from Unholychick/patch-mana

Core/Spells: Implement SPELL_ATTR7_CAN_RESTORE_SECONDARY_POWER