Refactor tests of xc module #15858

Job	Run time
Build extra components with Intel toolchain	20m 16s
Build with GNU toolchain	9m 11s
Build without MPI	7m 27s
Build without LCAO	6m 14s
Build with Intel toolchain	9m 5s
Build extra components with GNU toolchain	24m 18s
Build without LCAO and MPI	4m 34s
Build with CUDA support	14m 21s
Build without ELPA	9m 12s
	1h 44m 38s

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