Do not expose Celerity internals in installed headers #4737

Job	Run time
read-build-matrix	7s
clang-tidy	8m 28s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Debug)	7m 9s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Release)	7m 40s
build-and-test (dpcpp, latest, true, 24.04, intel, Debug)	7m 11s
build-and-test (dpcpp, latest, true, 24.04, intel, Release)	7m 42s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Debug)	5m 26s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Release)	7m 16s
build-and-test (acpp, latest, true, 24.04, nvidia, Debug)	6m 51s
build-and-test (acpp, latest, true, 24.04, nvidia, Release)	8m 16s
build-and-test (simsycl, HEAD, true, 24.04, intel, Release)	1m 51s
build-and-test (simsycl, HEAD, true, 24.04, intel, Debug)	4m 46s
report	0s
tag-latest-containers	0s
	1h 12m 43s

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