testing/*: disable on loongarch64 due to libc crate
Because rust libc crate fuild failed, these aports cannot build successfully on loongarch64.
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
Because rust libc crate fuild failed, these aports cannot build successfully on loongarch64.