ci: run zephyr twister jobs only on scheduled pipelines

Twister jobs appear to be extremely heavy. Given that we do not have resources
to run them on each change, spawn them only in scheduled pipelines.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

.oniro-ci/machines-and-flavours.yaml

@@ -240,6 +240,9 @@ zephyr-96b-nitrogen-tests-clang:
     MACHINE: 96b-nitrogen
     CI_ONIRO_RECIPE_NAME: zephyr-kernel-test-twister
     CI_ONIRO_JOB_ARTIFACTS: "twister*.tar.bz2"
+  rules:
+    # Twister tests are somewhat heavy. Run them only on scheduled pipelines.
+    - if: $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULED_TYPE == "daily"
 zephyr-96b-nitrogen-twister-gcc:
   extends: [.zephyr-96b-nitrogen-twister, .toolchain-gcc]
 zephyr-96b-nitrogen-twister-clang:
@@ -251,6 +254,9 @@ zephyr-96b-nitrogen-twister-clang:
     MACHINE: qemu-x86
     CI_ONIRO_RECIPE_NAME: zephyr-kernel-test-twister
     CI_ONIRO_JOB_ARTIFACTS: "twister*.tar.bz2"
+  rules:
+    # Twister tests are somewhat heavy. Run them only on scheduled pipelines.
+    - if: $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULED_TYPE == "daily"
 zephyr-qemu-x86-twister-gcc:
   extends: [.zephyr-qemu-x86-twister, .toolchain-gcc]
 zephyr-qemu-x86-twister-clang:
@@ -262,6 +268,9 @@ zephyr-qemu-x86-twister-clang:
     MACHINE: qemu-cortex-m3
     CI_ONIRO_RECIPE_NAME: zephyr-kernel-test-twister
     CI_ONIRO_JOB_ARTIFACTS: "twister*.tar.bz2"
+  rules:
+    # Twister tests are somewhat heavy. Run them only on scheduled pipelines.
+    - if: $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULED_TYPE == "daily"
 zephyr-qemu-cortex-m3-twister-gcc:
   extends: [.zephyr-qemu-cortex-m3-twister, .toolchain-gcc]
 zephyr-qemu-cortex-m3-twister-clang: