Add opensuse-15.5 and sles-15.5

Need to go back a python version to maintain support with 15.6.

.github/workflows/bbw_build_container.yml

@@ -105,6 +105,11 @@ jobs:
             platforms: linux/amd64, linux/arm64/v8, linux/ppc64le
             # //TEMP chicken/egg problem - could add s390x
             # but that would need a galera-4 build from on this image
+          - dockerfile: opensuse.Dockerfile pip.Dockerfile
+            image: opensuse/leap:15.5
+            tag: opensuse15.5
+            platforms: linux/amd64
+            nogalera: true
           - dockerfile: opensuse.Dockerfile pip.Dockerfile
             image: opensuse/leap:15.6
             tag: opensuse15
@@ -113,6 +118,11 @@ jobs:
             image: registry.suse.com/bci/bci-base:15.6
             tag: sles15
             platforms: linux/amd64, linux/s390x
+          - dockerfile: sles.Dockerfile pip.Dockerfile
+            image: registry.suse.com/bci/bci-base:15.5
+            tag: sles15.5
+            platforms: linux/amd64, linux/s390x
+            nogalera: true
           - dockerfile: centos.Dockerfile
             image: rockylinux:8
             platforms: linux/amd64, linux/arm64/v8

ci_build_images/opensuse.Dockerfile

@@ -49,8 +49,8 @@ RUN zypper update -y \
     pcre2-devel \
     perl-Net-SSLeay \
     policycoreutils \
-    python312-devel \
-    python312-pip \
+    python311-devel \
+    python311-pip \
     rpm-build \
     rpmlint \
     snappy-devel \

ci_build_images/sles.Dockerfile

@@ -47,8 +47,8 @@ RUN zypper -n update \
     pcre2-devel \
     perl-Net-SSLeay \
     policycoreutils \
-    python312-devel \
-    python312-pip \
+    python311-devel \
+    python311-pip \
     rpm-build \
     rpmlint \
     snappy-devel \