Update base OS to AlmaLinux 9.3 and Java 17

Gerrit v3.10 is certified to work with AlmaLinux 9.3
and is built for Java 17.

Change-Id: Iac255e03b33e03f4919caac29d2487ba12baaf73

src/test/docker/gerrit/Dockerfile

diff --git a/src/test/docker/gerrit/Dockerfile b/src/test/docker/gerrit/Dockerfile
index c05073e..5602349 100644
--- a/src/test/docker/gerrit/Dockerfile
+++ b/src/test/docker/gerrit/Dockerfile
@@ -1,9 +1,9 @@
-FROM almalinux:8.5
+FROM almalinux:9.3
 
 # Install dependencies
 RUN yum -y install \
     git \
-    java-11-openjdk \
+    java-17-openjdk \
     procps \
     sudo \
     passwd \
@@ -11,7 +11,6 @@
     && yum -y clean all
 
 ENV GERRIT_VERSION=3.10
-ENV JAVA_HOME /usr/lib/jvm/jre-11-openjdk
 
 # Add gerrit user
 RUN adduser -p -m --uid 1000 gerrit --home-dir /home/gerrit