Unwrap TermSetWrapper in ObjectMapper and not the IO #1739

Job	Run time
linux-gallery-python3.12-ros3	1m 22s
linux-gallery-python3.12-upgraded	1m 3s
windows-gallery-python3.12-upgraded	1m 54s
linux-gallery-python3.8-minimum	46s
windows-gallery-python3.8-minimum	1m 46s
conda-linux-python3.12-upgraded	2m 30s
conda-linux-python3.8-minimum	2m 36s
linux-python3.12	2m 13s
linux-python3.12-upgraded	2m 17s
linux-python3.8-minimum	1m 56s
macos-python3.12-upgraded	2m 57s
macos-python3.8-minimum	2m 49s
windows-python3.12-upgraded	3m 15s
windows-python3.8-minimum	2m 56s
Deploy pre-release from dev	0s
	30m 20s

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