cmake: fix build without gcc13

Merged Thibault Lemaire requested to merge feat/mantis-11816-build-with-gcc-13 into release/2.2

docker: archlinux: upgrade to gcc13 docker: archlinux: add tests dependencies

cmake: fix maybe-uninit false positives

sdk: update to 5.2.85

ci: archlinux: Make the GCC build run always

nix: use gcc13 (cherry picked from commit 2fd60f97)

https://bugs.linphone.org/view.php?id=11816

Edited by Thibault Lemaire

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