MDEV-34721: Make debian/autobake-debs.sh change compat level when needed

Debian Deb Compat level version 12 brings more Systemd confort
to Debian package installation handling.
Althought it's not working correctly on certain Debian and
Ubuntu version which MariaDB supports.

Commit add change to compat level to version 12 when
it's should be working correctly.

Currently these distros that are changed:
  * Debian Bullseye (11)
  * Debian Bookwork (12)
  * Debian Trixie (13)
  * Debian Sid
  * Ubuntu Lunar (23.04)
  * Ubuntu Mantic (23.10)
  * Ubuntu Noble (24.04)
  * Ubuntu Oracular (24.10)

debian/autobake-deb.sh

@@ -77,6 +77,14 @@ disable_libfmt()
   sed '/libfmt-dev/d' -i debian/control
 }
 
+change_compat_level()
+{
+  echo "${1}" > debian/compat
+  sed -e 's/ --fail-missing//' \
+      -e 's/#override_dh_missing/override_dh_missing/' \
+      -e 's/#\tdh_missing/\tdh_missing/' -i debian/rules
+}
+
 architecture=$(dpkg-architecture -q DEB_BUILD_ARCH)
 uname_machine=$(uname -m)
 
@@ -111,9 +119,10 @@ in
   "buster")
     disable_libfmt
     replace_uring_with_aio
-    ;&
+    ;;
   "bullseye")
     add_lsb_base_depends
+    change_compat_level 12
     ;&
   "bookworm")
     # mariadb-plugin-rocksdb in control is 4 arches covered by the distro rocksdb-tools
@@ -122,10 +131,12 @@ in
     then
       replace_uring_with_aio
     fi
+    change_compat_level 12
     ;&
   "trixie"|"sid")
     # The default packaging should always target Debian Sid, so in this case
     # there is intentionally no customizations whatsoever.
+    change_compat_level 12
     ;;
   # Ubuntu
   "focal")
@@ -134,12 +145,13 @@ in
     ;&
   "jammy"|"kinetic")
     add_lsb_base_depends
-    ;&
+    ;;
   "lunar"|"mantic")
     if [[ ! "$architecture" =~ amd64|arm64|armhf|ppc64el|s390x ]]
     then
       replace_uring_with_aio
     fi
+    change_compat_level 12
     ;&
   "noble")
     # mariadb-plugin-rocksdb s390x not supported by us (yet)
@@ -149,6 +161,7 @@ in
     then
       remove_rocksdb_tools
     fi
+    change_compat_level 12
     ;;
   *)
     echo "Error: Unknown release '$LSBNAME'" >&2

debian/rules

@@ -192,6 +192,11 @@ override_dh_installinit-arch:
 override_dh_gencontrol:
 	dh_gencontrol -- -Tdebian/substvars
 
+# When running compat level 12 or higher this is needed
+# to preserve --fail-missing
+#override_dh_missing:
+#	dh_missing --list-missing --fail-missing
+
 # If a file is not supposed to be included anywhere, add it to the not-installed
 # file and document the reason. Note that dh_install supports the above mentioned
 # white list file only starting from Debian Stretch and Ubuntu Xenial.