gitlab-ci: Cope with OBS slowdown

OBS 2.10 has just been deployed and we started hitting timeouts. Being more patient, does not seem to help.

In the meantime, skip OBS scanning by default unless the SKIP_OBS var is set to no.

Task: https://phabricator.apertis.org/T8880

.gitlab-ci.yml

@@ -18,6 +18,13 @@ variables:
       For instance use `*` to process all updates, `dash` to only process `pkg/dash`.
       Leave it empty to not trigger any update.
     value: ""
+  SKIP_OBS:
+    description: |
+      The OBS 2.10 update made things sensibly slower, causing timeouts in the
+      packaging-data-fetch-obs job. Disable it for now.
+      See https://phabricator.apertis.org/T8880
+    value: "yes"
+
 
 stages:
   - lint
@@ -194,7 +201,7 @@ packaging-data-fetch-binaries-published:
 
 packaging-data-fetch-obs:
   stage: fetch
-  timeout: 1h 30m
+  timeout: 3h
   tags:
     - lightweight
   before_script:
@@ -214,6 +221,8 @@ packaging-data-fetch-obs:
     paths:
       - packaging-data-obs.yaml
   rules:
+    - if: $SKIP_OBS == "yes"
+      when: never
     - if: $TRIGGER_FROM_JOB
       when: never
     - if: $CI_PIPELINE_SOURCE != "merge_request_event"
@@ -249,7 +258,7 @@ storage-usage:
   artifacts:
     paths:
       - storage.yaml
-  timeout: 1h 30m
+  timeout: 3h
   rules:
     - if: $TRIGGER_FROM_JOB
       when: never
@@ -263,6 +272,8 @@ packaging-check-invariants:
         python3-gitlab
         python3-yaml
   script:
+    - |
+      test "$SKIP_OBS" = yes && echo '{}' > packaging-data-obs.yaml
     - ./bin/yaml-merge
         --input packaging-data-downstream.yaml
         --input packaging-data-sources-upstream.yaml