Make SharedAssetDepot implementation not inline #3001

Job	Run time
Documentation	11m 47s
Linting	26m 58s
Quick Checks	9s
windows-2022 / Debug	25m 58s
ubuntu-22.04 / gcc / Debug	20m 8s
windows-2022 / RelWithDebInfo	30m 19s
ubuntu-22.04 / gcc / RelWithDebInfo	27m 14s
ubuntu-20.04 / clang / Debug	19m 38s
ubuntu-20.04 / clang / RelWithDebInfo	25m 35s
macos-13 / clang / Debug	9m 49s
macos-13 / clang / RelWithDebInfo	6m 28s
	3h 24m 3s

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