Do not expose Celerity internals in installed headers #4723

Job	Run time
clang-tidy	11m 8s
read-build-matrix	8s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Debug)	7m 51s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Release)	8m 42s
build-and-test (dpcpp, latest, true, 24.04, intel, Debug)	8m 20s
build-and-test (dpcpp, latest, true, 24.04, intel, Release)	9m 0s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Debug)	6m 30s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Release)	9m 16s
build-and-test (acpp, latest, true, 24.04, nvidia, Debug)	7m 2s
build-and-test (acpp, latest, true, 24.04, nvidia, Release)	9m 47s
build-and-test (simsycl, HEAD, true, 24.04, intel, Release)	6m 11s
build-and-test (simsycl, HEAD, true, 24.04, intel, Debug)	5m 59s
report	0s
tag-latest-containers	0s
	1h 29m 54s

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