Add support for corrupting with more than two modifiers

[vaisest]

Description of the problem being solved:

This adds support for creating items with more corrupted implicit modifiers. Useful for:

• vestigial implicit (should also work for bricked rares) (correctly keeps the vestigial implicit and only allows 4)
• glimpse of chaos (including the special modifiers)
• hands of the high templar

This was done by parsing the "can be modified while corrupted" as mod("CorruptImplicitCount", "BASE", 5 this is definitely not technically correct, but since the vestigial implicit and all the other items have that modifier, I think this is the cleanest way of doing this. I would assume that if GGG nerfs this count, they will also change the vestigial implicit wording, and we can easily parse the "can have up to 5 implicit modifiers" line.

Note that this depends on #10156, but was separated because it mixes non-vestigial stuff in

Steps taken to verify a working solution:

• Nothing crashes
• Scourge still functions
• All 3 described items function

Link to a build that showcases this PR:

Before screenshot:

2 selectors

After screenshot: