ActorUnkRMSD: Unify code structure between RMSX files

[Mityno]

Also a small fix

[decomp-dev]

Report for eur (af4e4dc - 6089e23)

📈 Matched code: 6.30% (+0.00%, +36 bytes)

✅ 1 new match

Unit	Item	Bytes	Before	After
src/063_Shrine/Actor/ActorUnkRMSD	ActorProfileUnkRMSD::Create()	+1	99.89%	100.00%

📈 3 improvements in unmatched items

Unit	Item	Bytes	Before	After
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::ActorUnkRMSD()	+16	26.31%	39.93%
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::~ActorUnkRMSD()	+8	66.67%	83.17%
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::~ActorUnkRMSD()	+7	71.43%	85.57%

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Report for jp (af4e4dc - 6089e23)

📈 Matched code: 6.27% (+0.00%, +36 bytes)

✅ 1 new match

Unit	Item	Bytes	Before	After
src/063_Shrine/Actor/ActorUnkRMSD	ActorProfileUnkRMSD::Create()	+1	99.89%	100.00%

📈 3 improvements in unmatched items

Unit	Item	Bytes	Before	After
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::ActorUnkRMSD()	+16	26.31%	39.93%
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::~ActorUnkRMSD()	+8	66.67%	83.17%
src/063_Shrine/Actor/ActorUnkRMSD	ActorUnkRMSD::~ActorUnkRMSD()	+7	71.43%	85.57%

[Mityno]

I'm preparing another PR for other RMSX files that have some exact duplicate functions.
They all inherit from a parent class that is not Actor directly (same parent class for all), right now I'm duplicating a placeholder for it in every RMSX file (including this one). We should maybe discuss how to deal with that (I don't know how to delink the initial class yet, because I think it is needed atm).

Let me know if you think the new syntax for GetResource is okay, I copied it from some other file with similar access pattern.