ELFIO segment memory usage reduction by removing memory duplication #404

Job	Run time
CMake Build & Test (ubuntu-latest, Debug, clang++)	1m 2s
CMake Build & Test (ubuntu-latest, Release, clang++)	1m 25s
CMake Build & Test (ubuntu-22.04, Release, clang++)	1m 11s
CMake Build & Test (ubuntu-22.04, Debug, clang++)	57s
CMake Build & Test (ubuntu-22.04, Release, g++)	1m 15s
CMake Build & Test (windows-2022, Release, cl)	1m 37s
CMake Build & Test (ubuntu-latest, Release, g++)	1m 14s
CMake Build & Test (macos-13, Release, g++)	2m 0s
CMake Build & Test (macos-13, Release, clang++)	1m 23s
CMake Build & Test (ubuntu-latest, Debug, g++)	41s
CMake Build & Test (macos-15, Release, clang++)	39s
CMake Build & Test (ubuntu-22.04, Debug, g++)	39s
CMake Build & Test (macos-15, Debug, g++)	41s
CMake Build & Test (windows-latest, Release, cl)	1m 59s
CMake Build & Test (windows-2022, Debug, cl)	1m 28s
CMake Build & Test (macos-13, Debug, clang++)	1m 29s
CMake Build & Test (macos-13, Debug, g++)	59s
CMake Build & Test (macos-15, Debug, clang++)	36s
CMake Build & Test (windows-latest, Debug, cl)	1m 30s
CMake Build & Test (macos-15, Release, g++)	49s
	23m 34s

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