MT#57453 Switch docker image to bookworm

Change-Id: I98b27ce8f7e153881892253056d950bc91f45e56

t/Dockerfile

@@ -1,11 +1,11 @@
-# DOCKER_NAME=kamailio-config-tests-bullseye
-FROM docker.mgm.sipwise.com/sipwise-bullseye:latest
+# DOCKER_NAME=kamailio-config-tests-bookworm
+FROM docker.mgm.sipwise.com/sipwise-bookworm:latest
 
 # Important! Update this no-op ENV variable when this Dockerfile
 # is updated with the current date. It will force refresh of all
 # of the base images and things like `apt-get update` won't be using
 # old cached versions when the Dockerfile is built.
-ENV REFRESHED_AT 2023-03-07
+ENV REFRESHED_AT 2023-06-26
 
 RUN apt-get update && apt-get install --assume-yes python3-yaml python3-junitxml \
   make libtemplate-perl libyaml-perl python3-pytest \
@@ -21,12 +21,12 @@ WORKDIR /code/
 # When you want to build the base image from scratch
 # (jump to the next section if you don't want to build yourself!):
 #
-# % docker build --tag="kamailio-config-tests-bullseye" -f t//Dockerfile .
-# % docker run --rm -i -t -v $(pwd):/code:rw kamailio-config-tests-bullseye:latest bash
+# % docker build --tag="kamailio-config-tests-bookworm" -f t//Dockerfile .
+# % docker run --rm -i -t -v $(pwd):/code:rw kamailio-config-tests-bookworm:latest bash
 #
 # Use the existing docker image:
-# % docker pull docker.mgm.sipwise.com/kamailio-config-tests-bullseye
-# % docker run --rm -i -t -v $(pwd):/code:rw docker.mgm.sipwise.com/kamailio-config-tests-bullseye:latest bash
+# % docker pull docker.mgm.sipwise.com/kamailio-config-tests-bookworm
+# % docker run --rm -i -t -v $(pwd):/code:rw docker.mgm.sipwise.com/kamailio-config-tests-bookworm:latest bash
 #
 # Inside docker (the command is in history, just press UP button):
 #   ./t/testrunner