Fix loading project.binary from PCK file
Fix loading project.binary from PCK file

Regression introduced in #16825.
My logic was correct, but not the error code I was expecting.
The error reporting in FileAccess likely needs a review too.

DmitriySalnikov/godot,MarianoGnu/godot,vnen/godot,okamstudio/godot,MarianoGnu/godot,DmitriySalnikov/godot,vnen/godot,ZuBsPaCe/godot,pkowal1982/godot,MarianoGnu/godot,Zylann/godot,akien-mga/godot,BastiaanOlij/godot,ZuBsPaCe/godot,groud/godot,groud/godot,guilhermefelipecgs/godot,akien-mga/godot,Zylann/godot,sanikoyes/godot,okamstudio/godot,Faless/godot,vkbsb/godot,godotengine/godot,ZuBsPaCe/godot,Zylann/godot,mcanders/godot,godotengine/godot,guilhermefelipecgs/godot,sanikoyes/godot,RandomShaper/godot,akien-mga/godot,godotengine/godot,firefly2442/godot,vnen/godot,honix/godot,godotengine/godot,MarianoGnu/godot,groud/godot,sanikoyes/godot,BastiaanOlij/godot,Shockblast/godot,guilhermefelipecgs/godot,godotengine/godot,mcanders/godot,Paulloz/godot,BastiaanOlij/godot,NateWardawg/godot,ex/godot,mcanders/godot,DmitriySalnikov/godot,Faless/godot,ex/godot,BastiaanOlij/godot,honix/godot,pkowal1982/godot,guilhermefelipecgs/godot,honix/godot,okamstudio/godot,firefly2442/godot,vkbsb/godot,akien-mga/godot,Zylann/godot,Paulloz/godot,pkowal1982/godot,akien-mga/godot,mcanders/godot,godotengine/godot,Shockblast/godot,vnen/godot,Paulloz/godot,sanikoyes/godot,pkowal1982/godot,akien-mga/godot,RandomShaper/godot,Valentactive/godot,BastiaanOlij/godot,Faless/godot,okamstudio/godot,ex/godot,Valentactive/godot,Paulloz/godot,NateWardawg/godot,Zylann/godot,NateWardawg/godot,josempans/godot,sanikoyes/godot,vnen/godot,Valentactive/godot,MarianoGnu/godot,ex/godot,vnen/godot,ZuBsPaCe/godot,groud/godot,BastiaanOlij/godot,DmitriySalnikov/godot,pkowal1982/godot,okamstudio/godot,Valentactive/godot,sanikoyes/godot,firefly2442/godot,NateWardawg/godot,ex/godot,josempans/godot,Shockblast/godot,josempans/godot,MarianoGnu/godot,ZuBsPaCe/godot,okamstudio/godot,groud/godot,Shockblast/godot,groud/godot,vkbsb/godot,Faless/godot,guilhermefelipecgs/godot,RandomShaper/godot,josempans/godot,Valentactive/godot,firefly2442/godot,pkowal1982/godot,Valentactive/godot,okamstudio/godot,vnen/godot,RandomShaper/godot,Faless/godot,Shockblast/godot,mcanders/godot,vkbsb/godot,Paulloz/godot,firefly2442/godot,okamstudio/godot,NateWardawg/godot,vkbsb/godot,Faless/godot,guilhermefelipecgs/godot,ex/godot,Faless/godot,godotengine/godot,pkowal1982/godot,Faless/godot,akien-mga/godot,DmitriySalnikov/godot,Valentactive/godot,vkbsb/godot,vkbsb/godot,mcanders/godot,Paulloz/godot,godotengine/godot,josempans/godot,firefly2442/godot,ZuBsPaCe/godot,MarianoGnu/godot,ZuBsPaCe/godot,MarianoGnu/godot,okamstudio/godot,NateWardawg/godot,ex/godot,josempans/godot,NateWardawg/godot,vnen/godot,NateWardawg/godot,BastiaanOlij/godot,RandomShaper/godot,josempans/godot,vkbsb/godot,honix/godot,firefly2442/godot,Shockblast/godot,firefly2442/godot,DmitriySalnikov/godot,honix/godot,ex/godot,Shockblast/godot,Valentactive/godot,RandomShaper/godot,Zylann/godot,ZuBsPaCe/godot,honix/godot,DmitriySalnikov/godot,Zylann/godot,NateWardawg/godot,Shockblast/godot,okamstudio/godot,sanikoyes/godot,Paulloz/godot,Zylann/godot,BastiaanOlij/godot,pkowal1982/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,josempans/godot,RandomShaper/godot,sanikoyes/godot,akien-mga/godot