Add crafting for Subsume the Source

[vaisest]

Description of the problem being solved:

This PR adds support for Subsume the Source, which is an unique which can have abyss jewel modifiers. This originally tried to add it as a big variant, and so this also contains the Megablood duplicate variant code from PoB2. This is admittedly now completely unrelated, but it should probably be ported anyway and so I've not removed it here.

Subsume the Source has its sockets fixed to not add useless abyss sockets.

The unique crafting should work with advanced copy items. It also has a dummy Crafted: true line in the unique DB which means it should work from there.

Another example I've added here is crimson storm. The unique db item had to have Suffix: None added to it

This is based on #10105, and it actually has that as the base branch

Steps taken to verify a working solution:

• Nothing so far

Link to a build that showcases this PR:

Item Class: Helmets
Rarity: Unique
Subsume the Source
Faithful Helmet
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Armour: 269
Energy Shield: 54
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Requirements:
Level: 73
Str: 101
Int: 101
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Item Level: 86
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{ Prefix Modifier "Scorching" — Damage, Elemental, Fire, Attack  — 210% Increased }
10(9-11) to 16(16-19) Added Fire Damage with Sword Attacks
{ Unique Modifier  — 210% Increased }
210(120-240)% increased Explicit Modifier magnitudes
{ Unique Modifier  — 210% Increased }
Cannot have non-Abyssal sockets
{ Suffix Modifier "of Unholy Might"  — 210% Increased }
3(3-5)% chance to Gain Unholy Might for 4 seconds on Melee Kill
(Unholy Might grants 100% of Physical Damage converted to Chaos Damage and 25% chance to apply Withered on Hit)
{ Suffix Modifier "of Adaption" (Tier: 1) — Attribute  — 210% Increased }
+7(6-8) to all Attributes
(Attributes are Strength, Dexterity, and Intelligence)
{ Suffix Modifier "of the Inferno" — Damage, Physical, Elemental, Fire  — 210% Increased }
Gain 3(2-4)% of Physical Damage as Extra Fire Damage if you've dealt a Critical Strike Recently
(Recently refers to the past 4 seconds)
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A lich may lust for vengeance, power,
darkness, or dominion, but it is their
nature. They can never be satisfied.
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Note: ~b/o 100 chaos

Item Class: Bows
Rarity: Unique
The Crimson Storm
Steelwood Bow
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Bow
Physical Damage: 98-145 (augmented)
Critical Strike Chance: 7.37% (augmented)
Attacks per Second: 1.40
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Requirements:
Level: 57
Dex: 190 (unmet)
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Sockets: W-W W W 
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Item Level: 85
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{ Implicit Modifier — Speed }
6% increased Movement Speed
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{ Unique Modifier — Damage, Physical, Attack }
69(60-80)% increased Physical Damage
{ Unique Modifier — Attack, Critical }
34(25-35)% increased Critical Strike Chance
{ Unique Modifier — Physical, Attack, Critical, Ailment }
50% chance to inflict Bleeding on Critical Strike with Attacks
(Bleeding deals Physical Damage over time, based on the base Physical Damage of the Skill. Damage is 200% higher while moving)
{ Unique Modifier }
Enemies you inflict Bleeding on grant 66(60-100)% increased Flask Charges
{ Unique Modifier — Damage, Physical }
Adds 104(100-120) to 163(150-165) Physical Damage against Bleeding Enemies
{ Unique Modifier — Critical }
50% chance to Maim Enemies on Critical Strike with Attacks
(Maimed enemies have 30% reduced Movement Speed)
{ Suffix Modifier "of the Order" (Tier: 1) — Damage, Physical }
+24(24-28)% to Physical Damage over Time Multiplier
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"There were no survivors. It had only been fired twice."
- Order of the Djinn inscription

Before screenshot:

After screenshot: