cpl_error.h: Move the include of stdbool for CPLErrorOnce into the he… #4344

Job	Run time
build-linux-ubuntu-focal	1h 19m 9s
build-mac	12m 29s
build-windows-conda	28m 20s
build-windows-conda-csharp-only	0s
build-windows-minimum	37m 31s
build-windows-msys2-mingw	31m 16s
	3h 8m 45s

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