remove gd files, simplify fakeiso

[water111]

• removes fake_iso.txt, now you just get all the files in out/iso available to OVERLORD
• simplify game.gp so to have *all-cgos*, *all-vis* and *all-str* lists, to avoid writing out all the names 2x.
• remove useless .gd files
• remove weird old resources folder that had dummy versions of a few files
• make things not blow up if files like SCREEN1.USA is missing

[coveralls]

Pull Request Test Coverage Report for Build 1656803019

• 11 of 12 (91.67%) changed or added relevant lines in 3 files are covered.
• 36 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.05%) to 53.194%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
decompiler/Function/Function.cpp	1	2	50.0%

Files with Coverage Reduction	New Missed Lines	%
decompiler/Function/Function.cpp	1	40.1%
game/overlord/isocommon.cpp	3	32.53%
game/system/IOP_Kernel.cpp	4	90.91%
game/overlord/iso_api.cpp	13	45.45%
game/overlord/iso.cpp	15	77.14%

Totals
Change from base Build 1656783342:	-0.05%
Covered Lines:	40806
Relevant Lines:	76711

---

💛 - Coveralls