ci: twister: pull testing group in manifest

We need the tests in CI to be able to run them on supported platforms.

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

Author: nashif

.github/workflows/twister.yaml

@@ -192,7 +192,7 @@ jobs:
           echo "$HOME/.cargo/bin" >> $GITHUB_PATH
 
           west init -l . || true
-          west config manifest.group-filter -- +ci,+optional
+          west config manifest.group-filter -- +ci,+optional,+testing
           west config --global update.narrow true
           west update --path-cache /repo-cache/zephyrproject 2>&1 1> west.update.log || west update --path-cache /repo-cache/zephyrproject 2>&1 1> west.update.log || ( rm -rf ../modules ../bootloader ../tools && west update --path-cache /repo-cache/zephyrproject)
           west forall -c 'git reset --hard HEAD'