Add rule for push!(::IdSet)

[ToucheSir]

This is required on 1.11 because the underlying implementation changed in JuliaLang/julia@cb01a3b from using an IdDict (which Zygote can diff through) to a direct ccall.

PR Checklist

• Tests are added
• Documentation, if applicable

[ToucheSir]

NNlib reverse CI will be fixed by FluxML/NNlib.jl#559. DynamicPPL tests still appear unrelated. Remaining failures (not errors) don't use implicit params, and may be related to ChainRules since they're testing those rules rather than Zygote ones.

[ToucheSir]

Revisiting this because it squashes one error on nightly that is making all PRs fail. It does expose another error related to try-catch, but I imagine #1474 would help with that.

[CarloLucibello]

Add test?

[CarloLucibello]

or no test is needed, it fixes an error on nightly?

[ToucheSir]

The latter. The codepath was already tested, but it was broken ever since 1.11 became the nightly version:

Zygote.jl/test/interface.jl

Lines 265 to 267 in 2517e67

	sgs = gradient(ps) do
	sum(sum(x) for x in Zygote.Params([d.W, d.b]))
	end