Add CI build/test jobs for Debian 12 (Bookworm)

This MR adds CI pipeline jobs for Debian 12 (Bookworm).

.gitlab/ci/debian.yml

@@ -15,6 +15,9 @@ include:
 .bullseye:
   image: igwn/builder:bullseye
 
+.bookworm:
+  image: igwn/builder:bookworm
+
 # -- source packages --------
 #
 # These jobs make DSC packages
@@ -44,6 +47,11 @@ dsc:bullseye:
     - .dsc
     - .bullseye
 
+dsc:bookworm:
+  extends:
+    - .dsc
+    - .bookworm
+
 # -- binary packages --------
 #
 # These jobs generate DEB
@@ -66,6 +74,13 @@ deb:bullseye:
   needs:
     - dsc:bullseye
 
+deb:bookworm:
+  extends:
+    - .deb
+    - .bookworm
+  needs:
+    - dsc:bookworm
+
 # -- test -------------------
 
 .test:debian:
@@ -103,6 +118,15 @@ test:bullseye:
     - deb:bullseye
   image: igwn/base:bullseye
 
+test:bookworm:
+  extends:
+    - .test:debian
+    - .bookworm
+  needs:
+    - tarball
+    - deb:bookworm
+  image: igwn/base:bookworm
+
 # -- lint -------------------
 #
 # These jobs check the code
@@ -123,3 +147,10 @@ lintian:bullseye:
     - .bullseye
   needs:
     - deb:bullseye
+
+lintian:bookworm:
+  extends:
+    - .lintian
+    - .bookworm
+  needs:
+    - deb:bookworm