ci: when testing with twister, force toolchain

Some of the test platforms might not be enabled with zephyr toolchain
yet, so force toolchain to be able to test platforms with the new SDK.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

.github/workflows/ci.yml

@@ -1566,6 +1566,7 @@ jobs:
         # Run tests with twister
         TWISTER="${ZEPHYR_ROOT}/scripts/twister"
         ${TWISTER} -v -N -M --force-color --inline-logs --retry-failed 3 \
+                   --force-toolchain \
                    --subset ${{ matrix.subset }}/${{ env.SUBSET_COUNT }} \
                    ${HOST_ARGS} \
                    ${TEST_ARGS} \