regression in function of symmetric matrix gradients

[CarloLucibello]

In #1545 I marked as broken some tests involving symmetric matrices that fail on julia v1.11.

This issue is to keep track of them.

https://github.com/FluxML/Zygote.jl/pull/1545/files#diff-cdee2d56be3355cc6bd5017dddc2d44ba8a1285d8f8eef6d45f38485b8c113acR1065

https://github.com/FluxML/Zygote.jl/pull/1545/files#diff-cdee2d56be3355cc6bd5017dddc2d44ba8a1285d8f8eef6d45f38485b8c113acR1177