Make GPUInterpreter extensible #1405

Job	Run time
Julia 1.11 x86_64-linux-gnuassert	41s
Julia 1.11 x86_64-linux-gnuassert --opaque-pointers	42s
Julia 1.10 - ubuntu-latest - x64	42s
Julia 1.10 - macOS-latest - x64	45s
Julia 1.10 - windows-latest - x64	54s
Julia pre - ubuntu-latest - x64	58s
Julia pre - macOS-latest - x64	54s
Julia pre - windows-latest - x64	40s
Julia nightly - ubuntu-latest - x64	42s
Julia nightly - macOS-latest - x64	44s
Julia nightly - windows-latest - x64	41s
Julia 1.10 --opaque-pointers - ubuntu-latest - x64	56s
Julia 1.10 --opaque-pointers - macOS-latest - x64	44s
Julia 1.10 --opaque-pointers - windows-latest - x64	42s
Julia pre --opaque-pointers - ubuntu-latest - x64	57s
Julia pre --opaque-pointers - macOS-latest - x64	1s
Julia pre --opaque-pointers - windows-latest - x64	36s
	12m 19s

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