Update build targets

.gitlab-ci.yml

 stages:
-- build
-- test
-- upload
+  - build
+  - test
+  - upload
 
 variables:
   DOCKER_IMAGE_BASE: registry.icinga.com/build-docker
@@ -12,44 +12,41 @@ variables:
 .build: &build
   stage: build
   tags:
-  - docker
+    - docker
   image: ${DOCKER_IMAGE_BASE}/${DOCKER_IMAGE}
   script:
-  - icinga-build-package
+    - icinga-build-package
   cache:
     key: "${CI_JOB_NAME}"
     paths:
-    - ccache/
-    - 'icinga-php-common.git'
+      - ccache/
+      - 'icinga-php-common.git'
   artifacts:
     paths:
-    - build/*
+      - build/*
     expire_in: 1 week
 
 .test: &test
   stage: test
   tags:
-  - docker
+    - docker
   image: ${DOCKER_IMAGE_BASE}/${DOCKER_IMAGE}
   script:
-  - find build/
-  - icinga-build-test
+    - find build/
+    - icinga-build-test
 
 .upload: &upload
   stage: upload
   tags:
-  - docker
+    - docker
   image: ${DOCKER_IMAGE_BASE}/upload
   script:
-  - find build/
-  - icinga-build-upload-aptly
+    - find build/
+    - icinga-build-upload-aptly
   only:
-  - master
-  - tags
+    - master
+    - tags
 
-###################################
-# Debian
-###################################
 build/debian/bullseye:
   <<: *build
   variables:
@@ -60,12 +57,12 @@ test/debian/bullseye:
   variables:
     DOCKER_IMAGE: debian/bullseye
   dependencies:
-  - build/debian/bullseye
+    - build/debian/bullseye
 
 upload/debian/bullseye:
   <<: *upload
   dependencies:
-  - build/debian/bullseye
+    - build/debian/bullseye
 
 build/debian/buster:
   <<: *build
@@ -77,16 +74,13 @@ test/debian/buster:
   variables:
     DOCKER_IMAGE: debian/buster
   dependencies:
-  - build/debian/buster
+    - build/debian/buster
 
 upload/debian/buster:
   <<: *upload
   dependencies:
-  - build/debian/buster
+    - build/debian/buster
 
-###################################
-# Ubuntu
-###################################
 build/ubuntu/jammy:
   <<: *build
   variables:
@@ -97,12 +91,12 @@ test/ubuntu/jammy:
   variables:
     DOCKER_IMAGE: ubuntu/jammy
   dependencies:
-  - build/ubuntu/jammy
+    - build/ubuntu/jammy
 
 upload/ubuntu/jammy:
   <<: *upload
   dependencies:
-  - build/ubuntu/jammy
+    - build/ubuntu/jammy
 
 build/ubuntu/focal:
   <<: *build
@@ -114,33 +108,13 @@ test/ubuntu/focal:
   variables:
     DOCKER_IMAGE: ubuntu/focal
   dependencies:
-  - build/ubuntu/focal
+    - build/ubuntu/focal
 
 upload/ubuntu/focal:
   <<: *upload
   dependencies:
-  - build/ubuntu/focal
+    - build/ubuntu/focal
 
-build/ubuntu/bionic:
-  <<: *build
-  variables:
-    DOCKER_IMAGE: ubuntu/bionic
-
-test/ubuntu/bionic:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: ubuntu/bionic
-  dependencies:
-  - build/ubuntu/bionic
-
-upload/ubuntu/bionic:
-  <<: *upload
-  dependencies:
-  - build/ubuntu/bionic
-
-###################################
-# Raspbian
-###################################
 build/raspbian/bullseye:
   <<: *build
   variables:
@@ -157,20 +131,3 @@ upload/raspbian/bullseye:
   <<: *upload
   dependencies:
     - build/raspbian/bullseye
-
-build/raspbian/buster:
-  <<: *build
-  variables:
-    DOCKER_IMAGE: raspbian/buster
-
-test/raspbian/buster:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: raspbian/buster
-  dependencies:
-    - build/raspbian/buster
-
-upload/raspbian/buster:
-  <<: *upload
-  dependencies:
-    - build/raspbian/buster