.oniro-ci: remove rules from .bitbake-workspace

Apparently those rules clash with the rules defined in the .gitlab-ci.yml .workspace-rules, due to the order of evaluation inside GitLab.

.oniro-ci/build-generic.yaml

@@ -15,7 +15,9 @@
     CI_ONIRO_MANIFEST_MIRROR: oniro-develop
     CI_ONIRO_GIT_REPO_PATH: ""
     CI_ONIRO_INSTANCE_SIZE: s3.large.8
+    CI_ONIRO_MAGIC: ".oniro-ci/build-generic.yaml:18:.workspace"
   before_script:
+    - env | grep -E ^CI_ONIRO | sort
     - test ! -e "$CI_PROJECT_DIR"/.scratch-dir-name || (
         echo "precondition failed - concurrent modification of $CI_PROJECT_DIR"
         && env | grep CI_ | sort
@@ -91,6 +93,7 @@
     CI_ONIRO_BB_LOCAL_CONF_plus_equals_USER_CLASSES: "buildstats buildstats-summary"
     CI_ONIRO_DEVTOOL_RECIPE_NAME: ""
     CI_ONIRO_DEVTOOL_LAYER_PATH: ""
+    CI_ONIRO_MAGIC: ".oniro-ci/build-generic.yaml:96:.bitbake-workspace"
 
   before_script:
     # Bitbake requires a non-root user to operate.