ci(github-actions): use julia-actions/cache #3826

Job	Run time
downgrade	2h 16m 40s
test (1.10, ubuntu-latest, core_layers)	29m 14s
test (1.10, ubuntu-latest, normalize_layers)	24m 17s
test (1.10, ubuntu-latest, recurrent_layers)	32m 4s
test (1.10, ubuntu-latest, autodiff)	1h 2m 45s
test (1.10, ubuntu-latest, misc)	34m 25s
test (1.10, ubuntu-latest, reactant)	18m 4s
test (1, ubuntu-latest, core_layers)	1h 2m 41s
test (1, ubuntu-latest, normalize_layers)	42m 31s
test (1, ubuntu-latest, recurrent_layers)	46m 12s
test (1, ubuntu-latest, autodiff)	1h 9m 2s
test (1, ubuntu-latest, misc)	1h 6m 19s
test (1, ubuntu-latest, reactant)	1h 25m 50s
test (1, macos-latest, all)	5h 25m 46s
test (1, windows-latest, all)	1h 44m 14s
	19h 0m 4s

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