boards/riscv/m2gl025_miv: run tests on m2gl025_miv board by default

Issue #37006 highlighted that some tests are prone to not passing on
QEMU for 32-bit RISC-V. This commit enables running tests in Renode on
emulated 32-bit RISC-V m2gl025_miv platform as a double-check.

Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>