Add `WeightNorm` reparametrization #3614

Job	Run time
Documentation	9m 19s
Julia 1.10 - ubuntu-latest - x64	19m 5s
Julia 1 - ubuntu-latest - x64	27m 36s
Julia nightly - ubuntu-latest - x64	5m 38s
Julia 1 - windows-latest - x64	30m 35s
Julia 1 - macOS-latest - aarch64	19m 48s
	1h 52m 1s

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