[libc] Enable bind test for riscv (#100132)
The bind test was failing in the rv32 build bot because of how the build bot was set to run the tests: we were using shared directories between the host and qemu and the bind function was trying to create a file in this directory, thus creating it in the host machine.
The OS was returning "-1 ENXIO (No such device or address)", so we changed the rv32 buildbot to copy the binaries to qemu and dropped the shared directories feature.
