Use build discarder on more jobs.

 - Remove artifacts for most jobs after 20 runs
 - Remove old jobs after 7 days for maintenance jobs

jobs/debian/schroot-maintenance.yaml

@@ -11,5 +11,8 @@
       - !include: axis-architecture.yaml.inc
     triggers:
       - timed: "H */6 * * *"
+    properties:
+      - build-discarder:
+          days-to-keep: 7
     builders:
       - shell: /usr/share/jenkins/debian-scripts/schroot-maintenance.sh

jobs/debian/update-scripts.yaml

@@ -13,6 +13,9 @@
           wipe-workspace: false
     triggers:
       - timed: "H * * * *"
+    properties:
+      - build-discarder:
+          days-to-keep: 7
     builders:
       - shell: chmod go+rX -R scripts/debian/
       - shell: rsync -az --delete scripts/debian/ /usr/share/jenkins/debian-scripts/

jobs/templates/debian/gbp-buildpackage.yaml

@@ -6,6 +6,9 @@
     deb-extra-repositories:
     deb-backport-on-success: unstable-swh>buster-swh
     project-type: pipeline
+    properties:
+      - build-discarder:
+          num-to-keep: 10
     parameters:
       - string:
           name: GIT_REVISION

jobs/templates/incoming-tag.yaml

@@ -5,6 +5,9 @@
     auth-token: 'ph4br1cat0r'
     incoming_tag_auto_pypi_host: pypi.org
     sandbox: true
+    properties:
+      - build-discarder:
+          num-to-keep: 20
     parameters:
       - git-parameter:
           name: GIT_TAG

jobs/templates/swh-pipeline-diff.yaml

@@ -9,6 +9,9 @@
     auth-token: 'ph4br1cat0r'
     phabricator_diff: true
     do_cypress: false
+    properties:
+      - build-discarder:
+          artifact-num-to-keep: 20
     parameters:
       - git-parameter:
           name: REVISION

jobs/templates/swh-pipeline.yaml

@@ -11,7 +11,7 @@
     auth-token: 'ph4br1cat0r'
     properties:
       - build-discarder:
-          num-to-keep: 20
+          artifact-num-to-keep: 20
     phabricator_diff: false
     do_cypress: false
     parameters:

jobs/templates/swh-pypi.yaml

@@ -6,7 +6,7 @@
     sandbox: true
     properties:
       - build-discarder:
-          num-to-keep: 20
+          artifact-num-to-keep: 10
     parameters:
       - git-parameter:
           name: GIT_TAG

jobs/tools/dockerfiles.yaml

@@ -9,8 +9,9 @@
       - pollscm:
           cron: "H/30 * * * *"
       - timed: '@daily'
-    build-discarder:
-      num-to-keep: 50
+    properties:
+      - build-discarder:
+          days-to-keep: 7
     wrappers:
       - timestamps
       - ansicolor