Make SharedAssetDepot implementation not inline #2999

Job	Run time
Documentation	12m 13s
Quick Checks	8s
Linting	27m 41s
ubuntu-22.04 / gcc / Debug	20m 32s
windows-2022 / Debug	25m 44s
ubuntu-22.04 / gcc / RelWithDebInfo	26m 18s
windows-2022 / RelWithDebInfo	29m 41s
ubuntu-20.04 / clang / Debug	20m 29s
ubuntu-20.04 / clang / RelWithDebInfo	25m 3s
macos-13 / clang / Debug	32m 51s
macos-13 / clang / RelWithDebInfo	32m 26s
	4h 13m 6s

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