CI: Add RV32A test suite to architectural tests

Incorporate the RV32A test suite into the architectural tests.

Author: visitorckw

.ci/riscv-tests.sh

@@ -17,3 +17,4 @@ make arch-test RISCV_DEVICE=FCZicsr || exit 1
 make arch-test RISCV_DEVICE=IZifencei || exit 1
 make arch-test RISCV_DEVICE=IZicsr || exit 1
 make arch-test RISCV_DEVICE=FZicsr || exit 1
+make arch-test RISCV_DEVICE=IMA || exit 1