Tests

Add Mooncake and Enzyme tests for Diagonal #1381

Job	Run time
Tests (1, ubuntu-latest) / Julia 1 - ubuntu-latest	48m 50s
Tests (lts, macOS-latest) / Julia lts - macOS-latest	7m 7s
Tests (lts, windows-latest) / Julia lts - windows-latest	49m 23s
Tests (1, windows-latest) / Julia 1 - windows-latest	49m 40s
Tests (1, macOS-latest) / Julia 1 - macOS-latest	10m 19s
Tests (lts, ubuntu-latest) / Julia lts - ubuntu-latest	48m 48s
	3h 34m 7s

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