Remove Cereal from GauXC #271

Job	Run time
NVIDIA Build (No Test) (OFF, OFF)	20m 4s
Release Build and Test (gnu, 12, ON, OFF)	26m 52s
Release Build and Test (gnu, 12, OFF, ON)	17m 33s
Release Build and Test (gnu, 12, OFF, OFF)	21m 40s
Release Build and Test (llvm, 19, ON, OFF)	25m 26s
NVIDIA Build (No Test) (ON, OFF)	19m 58s
Release Build and Test (llvm, 19, OFF, OFF)	16m 28s
macOS Build and Test	24m 46s
Release Build and Test (gnu, 12, ON, ON)	22m 18s
Debug Build and Test	37m 9s
NVIDIA Build (No Test) (OFF, ON)	20m 2s
CMake Discovery	19m 15s
Build as Subproject	13m 14s
	4h 44m 45s

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