Add `WeightNorm` reparametrization #3605

Job	Run time
Documentation	9m 27s
Julia 1.10 - ubuntu-latest - x64	19m 53s
Julia 1 - ubuntu-latest - x64	29m 1s
Julia nightly - ubuntu-latest - x64	5m 43s
Julia 1 - windows-latest - x64	32m 5s
Julia 1 - macOS-latest - aarch64	19m 4s
	1h 55m 13s

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