cmake: move to build dir #237

Job	Run time
coverage - measure	1m 51s
sanitizer - arm64v8/debian:bookworm	2m 51s
sanitizer - arm32v7/debian:bookworm	2m 22s
sanitizer - debian:bookworm	1m 50s
linux - ubuntu:noble	1m 46s
linux - igagis/raspbian:bookworm	3m 19s
msys2 - mingw32	2m 48s
ios	59s
msys2 - mingw64	2m 41s
linux - arm32v7/debian:bookworm	1m 58s
linux - debian:bookworm	59s
linux - arm64v8/debian:bookworm	2m 58s
conan - emscripten \|	2m 8s
conan - macos-latest	1m 31s
macosx	1m 59s
msvs	2m 19s
vcpkg - linux \|	2m 24s
conan - linux \|	2m 1s
android	5m 21s
	44m 5s

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