Enable -Wconversion tree-wide on darwin.#25376

Merged

bzbarsky-apple merged 2 commits intoproject-chip:masterfrom bzbarsky-apple:enable-Wconversion-mac

Mar 1, 2023

+18-5

Commits on Feb 28, 2023

Enable -Wconversion tree-wide on darwin.
bzbarsky-apple
committed
Also fix mbedtls, since apparently someone is building with that on Darwin.
bzbarsky-apple
committed