[MBF21] Implement the new scroll linedef types

[ioan-chera]

Classic format linedef types 1024, 1025 and 1026.

• [x] Test in Doom classic format
• [x] Test that scale is 8 times less than special 255 (scroll this line by offsets)
• [x] Test that indeed we're supposed to only affect the front sidedefs (or if not, that it's the same as in PrBoom+um)
• [x] Test the displacement scroller
• [x] Test the accelerative scroller
• [x] Test that we didn't break the linedef orientation scroller
• [x] Check that they work in Heretic classic format
• [x] Also check if UDMF needs anything equivalent or already has it. (NEED TO ADD)