refactor: Avoid `new`/`delete` in a number of places. #25495

Job	Run time
linux_ubuntu_extra (ubuntu2204, 20)	8m 44s
linux_ubuntu	41m 46s
linux_ubuntu_extra (ubuntu2204_clang, 20)	52m 51s
macos	6m 18s
linux_physmon	21m 42s
linux_examples_test	12m 44s
linux_physmon_perf_report	0s
	2h 24m 5s

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