Add support for Bifurcated Crits

[vaisest]

Description of the problem being solved:

Ports over bifurcate code from pob2 for:

The Mystical Infusion Notable Passive Skill no longer grants Base Spell Critical Strike Chance of Spells is equal to that of Main Hand Weapon. It now grants Spell Critical Strike Chance Bifurcates, and 30% less Spell Critical Strike Chance.
Bifurcated Critical Strikes cause Critical Strike chance to be rolled twice when determining if a Critical Strike should occur:

• If either roll succeeds the hit will be a regular Critical Strike, and if both rolls succeed the amount of extra damage dealt by the critical strike will be doubled. This is equivalent to doubling the amount by which the Critical Strike Multiplier exceeds 100 for that Hit.
• If a modifier makes your Critical Strike Chance Lucky or Unlucky, that luck will apply individually to each of the critical strike chance rolls.
• Effects which cause Hits to Always be Critical Strikes prevent Bifurcation - those hits do not roll the chance, so cannot roll it twice.

Steps taken to verify a working solution:

• Test ported
• More tests added
• Only affects spells
• Result seems correct
• Crit damage bonus disabled with guaranteed crit
• Does not apply to perfect agony (it sets NoCritMultiplier and the whole crit calculation gets skipped)

Link to a build that showcases this PR:

See test

Before screenshot:

After screenshot: