Add EnzymeRule for conv!/gather!/scatter!/dropout!/pool! (#536)

* Add EnzymeRule for conv

* Fix

* Add missing file

* Change to enzymecore ext

* attempt fix

* Finish enzymecore rewrite

* Add missing file

* Also add gather

* Additional functions, tests, and fixes

* minor fixup

* Add pooling

* Add dropout

* Fix scatter bug

* fix pool

* More fixups

* fix up pool

* split conv/depth

* Cleanup rule

* Fix minor test bug

* Fix depthwise conv

* Fix typo

* Bound tests

* Failing to extension

* Add file

* Address review

* Remove inlining

Project.toml

@@ -16,31 +16,37 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [weakdeps]
 AMDGPU = "21141c5a-9bdb-4563-92ae-f87d6854732e"
-cuDNN = "02a925ec-e4fe-4b08-9a7e-0d78e3d38ccd"
 CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
+EnzymeCore = "f151be2c-9106-41f4-ab19-57ee4f262869"
+cuDNN = "02a925ec-e4fe-4b08-9a7e-0d78e3d38ccd"
 
 [extensions]
 NNlibAMDGPUExt = "AMDGPU"
-NNlibCUDAExt = "CUDA"
 NNlibCUDACUDNNExt = ["CUDA", "cuDNN"]
+NNlibCUDAExt = "CUDA"
+NNlibEnzymeCoreExt = "EnzymeCore"
 
 [compat]
 AMDGPU = "0.5, 0.6"
 Adapt = "3.2"
 Atomix = "0.1"
-ChainRulesCore = "1.13"
 CUDA = "4, 5"
-cuDNN = "1"
+ChainRulesCore = "1.13"
+EnzymeCore = "0.5, 0.6"
 GPUArraysCore = "0.1"
 KernelAbstractions = "0.9.2"
 Requires = "1.0"
+cuDNN = "1"
 julia = "1.9"
 
 [extras]
 AMDGPU = "21141c5a-9bdb-4563-92ae-f87d6854732e"
 CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
 ChainRulesTestUtils = "cdddcdb0-9152-4a09-a978-84456f9df70a"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+Enzyme = "7da242da-08ed-463a-9acd-ee780be4f1d9"
+EnzymeCore = "f151be2c-9106-41f4-ab19-57ee4f262869"
+EnzymeTestUtils = "12d8515a-0907-448a-8884-5fe00fdf1c5a"
 FiniteDifferences = "26cc04aa-876d-5657-8c51-4c34ba976000"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
@@ -52,6 +58,5 @@ Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 cuDNN = "02a925ec-e4fe-4b08-9a7e-0d78e3d38ccd"
 
 [targets]
-test = ["AMDGPU", "CUDA", "ChainRulesTestUtils", "Documenter", 
-        "FiniteDifferences", "ForwardDiff", "Logging", "ReverseDiff", 
-        "StableRNGs", "Test", "UnicodePlots", "Zygote", "cuDNN"]
+test = ["AMDGPU", "CUDA", "ChainRulesTestUtils", "Documenter", "FiniteDifferences", "ForwardDiff", "Logging", "ReverseDiff", "StableRNGs", "Test", "UnicodePlots", "Zygote", "cuDNN",
+		"Enzyme", "EnzymeCore", "EnzymeTestUtils"]