upstream CI: Use Azure 'loops' to create stages

This patch modify the pipelines to create stages using the 'each'
expression on Azure pipelines, so that the configuration and the list of
distributions can be set using variables.

Testing CentOS 8 Stream and Galaxy collections still need to be handled
in a separate group, although, the pipeline configuration becomes easily
changed, specially when updating Ansible versions.

infra/azure/nightly.yml

@@ -12,115 +12,68 @@ trigger: none
 pool:
   vmImage: 'ubuntu-20.04'
 
+variables:
+  # We need to have two sets, as c8s is not supported by all ansible versions
+  recent_distros: "fedora-latest,fedora-rawhide,c9s"
+  distros: "fedora-latest,fedora-rawhide,c9s,c8s"
+  ansible_latest: "-core"
+  ansible_minimum: "-core <2.16"
+  ansible_version: "-core >=2.16,<2.17"
+
 stages:
 
-# Fedora
+# Minimum ansible
 
-- stage: fedora_latest_Ansible_Core_2_15
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: fedora-latest
-      ansible_version: "-core >=2.15,<2.16"
-      skip_git_test: true
+- ${{ each distro in split(variables.distros, ',') }}:
+  - stage: ${{ replace(distro, '-', '_') }}_ansible_2_15
+    dependsOn: []
+    jobs:
+    - template: templates/group_tests.yml
+      parameters:
+        build_number: $(Build.BuildNumber)
+        distro: fedora-latest
+        ansible_version: ${{ variables.ansible_minimum }}
+        skip_git_test: true
+        test_galaxy: false
 
-- stage: fedora_latest_Ansible_Core_2_16
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: fedora-latest
-      ansible_version: ""
-      skip_git_test: true
+# Latest ansible
 
-- stage: fedora_latest_Ansible_Core_2_17
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: fedora-latest
-      ansible_version: "-core >=2.17"
-      skip_git_test: true
+- ${{ each distro in split(variables.recent_distros, ',') }}:
+  - stage: ${{ replace(distro, '-', '_') }}_ansible_latest
+    dependsOn: []
+    jobs:
+    - template: templates/group_tests.yml
+      parameters:
+        build_number: $(Build.BuildNumber)
+        distro: ${{ distro }}
+        ansible_version: ${{ variables.ansible_latest }}
+        skip_git_test: true
+        test_galaxy: false
 
-# Galaxy on Fedora
+# Selected ansible-core version
 
-- stage: Galaxy_fedora_latest_Ansible_Core_2_17
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: fedora-latest
-      ansible_version: "-core >=2.17,<2.18"
-      skip_git_test: true
-      test_galaxy: true
+- ${{ each distro in split(variables.distros, ',') }}:
+  - stage: ${{ replace(distro, '-', '_') }}_ansible_2_16
+    dependsOn: []
+    jobs:
+    - template: templates/group_tests.yml
+      parameters:
+        build_number: $(Build.BuildNumber)
+        distro: ${{ distro }}
+        ansible_version: ${{ variables.ansible_version }}
+        skip_git_test: true
+        test_galaxy: false
 
-# Fedora Rawhide
+# Galaxy collection with selected ansible-core version
 
-- stage: fedora_rawhide_Ansible_Core_2_17
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: fedora-rawhide
-      ansible_version: "-core >=2.17,<2.18"
-      skip_git_test: true
-
-# CentoOS 9 Stream
-
-- stage: c9s_Ansible_Core_2_15
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: c9s
-      ansible_version: "-core >=2.15,<2.16"
-      skip_git_test: true
-
-- stage: c9s_Ansible_Core_2_16
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: c9s
-      ansible_version: "-core >=2.16,<2.17"
-      skip_git_test: true
-
-- stage: c9s_Ansible_Core_2_17
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: c9s
-      ansible_version: "-core >=2.17,<2.18"
-      skip_git_test: true
-
-# CentOS 8 Stream only works up to ansible-core 2.16.z
-
-- stage: c8s_Ansible_Core_2_15
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: c8s
-      ansible_version: "-core >=2.15,<2.16"
-      skip_git_test: true
-
-- stage: c8s_Ansible_Core_2_16
-  dependsOn: []
-  jobs:
-  - template: templates/group_tests.yml
-    parameters:
-      build_number: $(Build.BuildNumber)
-      distro: c8s
-      ansible_version: "-core >=2.16,<2.17"
-      skip_git_test: true
+- ${{ each distro in split(variables.distros, ',') }}:
+  - stage: galaxy_${{ replace(distro, '-', '_') }}_asible_2_16
+    dependsOn: []
+    jobs:
+    - template: templates/group_tests.yml
+      parameters:
+        build_number: $(Build.BuildNumber)
+        distro: ${{ distro }}
+        ansible_version: ${{ variables.ansible_version }}
+        skip_git_test: true
+        test_galaxy: true