ci: make some jobs interruptible

Jobs that don't interact with clouds can be canceled at any time without
the risk of leaving unused resources in the cloud. This enables the use
of "automatic cancellation of redundant pipelines" which means that if
and update is pushed to an open PR the current running pipeline is
canceled. This is done by adding an "interruptible" flag to the jobs.
Default value is false so only jobs that have it explicitly set to true
will be canceled.

.gitlab-ci.yml

@@ -36,6 +36,7 @@ init:
     - shell
   script:
     - schutzbot/update_github_status.sh start
+  interruptible: true
 
 RPM:
   stage: rpmbuild
@@ -44,6 +45,7 @@ RPM:
     - if: '$CI_PIPELINE_SOURCE != "schedule"'
   script:
     - sh "schutzbot/mockbuild.sh"
+  interruptible: true
   after_script:
     - schutzbot/update_github_status.sh update
     - schutzbot/save_journal.sh
@@ -75,6 +77,7 @@ Container:
     - if: '$CI_PIPELINE_SOURCE != "schedule"'
   script:
     - sh "schutzbot/containerbuild.sh"
+  interruptible: true
   parallel:
     matrix:
       - RUNNER:
@@ -88,6 +91,7 @@ Prepare-rhel-internal:
     - if: '$CI_PIPELINE_SOURCE == "schedule" && $RUNNER =~ /[\S]+rhel-8.6-[^ga][\S]+/ && $NIGHTLY == "true" && $RHEL_MAJOR == "8"'
   script:
     - schutzbot/prepare-rhel-internal.sh
+  interruptible: true
   artifacts:
     paths:
       - rhel-${RHEL_MAJOR}.json
@@ -113,6 +117,7 @@ Base:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/base_tests.sh
+  interruptible: true
   parallel:
     matrix:
       - RUNNER:
@@ -168,6 +173,7 @@ Regression:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/regression.sh
+  interruptible: true
   parallel:
     matrix:
       - RUNNER:
@@ -200,6 +206,7 @@ OSTree:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/ostree.sh
+  interruptible: true
   parallel:
     matrix:
       - RUNNER:
@@ -345,6 +352,7 @@ libvirt:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/libvirt.sh
+  interruptible: true
   parallel:
     matrix:
       - RUNNER:
@@ -364,6 +372,7 @@ RHEL 9 on 8:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/koji.sh
+  interruptible: true
   variables:
     RUNNER: aws/rhel-8.4-ga-x86_64
     INTERNAL_NETWORK: "true"
@@ -398,6 +407,7 @@ Installer:
   script:
     - schutzbot/deploy.sh
     - /usr/libexec/tests/osbuild-composer/installers.sh
+  interruptible: true
   parallel:
     matrix:
       - RUNNER: