Add caching allocator interface #776

Job	Run time
Documentation	1m 39s
OpenCL.jl	17m 49s
Julia 1.10 - ubuntu-latest - x64	9m 43s
Julia 1.10 - macOS-latest - x64	8m 2s
Julia 1.10 - windows-latest - x64	10m 21s
Julia pre - ubuntu-latest - x64	11m 59s
Julia pre - macOS-latest - x64	17m 45s
Julia pre - windows-latest - x64	13m 12s
Julia nightly - ubuntu-latest - x64	10m 37s
Julia nightly - macOS-latest - x64	12m 53s
Julia nightly - windows-latest - x64	12m 11s
	2h 6m 11s

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