linux

Introduce `MaybeSharedPtr` for managing user facing objects #1491

Job	Run time
build-and-test (dev3/x86_64-el9-clang16-opt, 20, ON)	15m 52s
build-and-test (dev4/x86_64-el9-clang16-opt, 20, ON)	29m 23s
build-and-test (dev4/x86_64-centos7-gcc11-opt, 17)	27m 11s
build-and-test (LCG_102/x86_64-centos7-clang12-opt, OFF, 17)	10m 43s
build-and-test (LCG_102/x86_64-centos8-gcc11-opt, OFF, 17)	11m 34s
	1h 34m 43s

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