MDBF-337: galera builds (Linux)

It was odd seeing mostly ppc64le/s390x test failures.
This was because these where the main tests of galera.

Added Fedora-40 to test the current distro galera package.

Add s390/ppc64le Ubuntu 2404 so that this tests there too
to see if modern compilers cause any different behaviour.

As there is no debug build of galera, added amd64-2404-debug
as a builder so that there is coverage of galera in a debug
build which has additional tests.

Author: grooverdan

constants.py

@@ -50,10 +50,14 @@
 builders_galera_mtr = [
     "aarch64-debian-12",
     "amd64-fedora-39",
+    "amd64-fedora-40",
+    "amd64-ubuntu-2004-debug",
     "s390x-ubuntu-2004",
     "s390x-ubuntu-2204",
+    "s390x-ubuntu-2404",
     "ppc64le-ubuntu-2004",
     "ppc64le-ubuntu-2204",
+    "ppc64le-ubuntu-2404",
 ]
 
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