Upgrade jmeter to 5.6.3 and java to jdk21

Dockerfile

@@ -1,15 +1,15 @@
-FROM openjdk:8-jre AS build-env
+FROM openjdk:21-jdk-bookworm AS build-env
 
 LABEL maintainer="Gokhan Sengun <[email protected]>"
 
-ADD https://archive.apache.org/dist/jmeter/binaries/apache-jmeter-5.4.3.zip /apache-jmeter.zip
+ADD https://archive.apache.org/dist/jmeter/binaries/apache-jmeter-5.6.3.zip /apache-jmeter.zip
 RUN unzip /apache-jmeter.zip -d / 
 
 RUN curl -L -o /usr/bin/jq https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64 && chmod u+x /usr/bin/jq
 
-FROM openjdk:8-jre AS runtime-env
+FROM openjdk:21-jdk-slim-bookworm AS runtime-env
 
-COPY --from=build-env /apache-jmeter-5.4.3 /jmeter
+COPY --from=build-env /apache-jmeter-5.6.3 /jmeter
 COPY --from=build-env /usr/bin/jq /usr/bin/jq
 
 RUN ln -s /jmeter/bin/jmeter /usr/local/bin/jmeter
@@ -18,8 +18,8 @@ RUN ln -s /jmeter/bin/jmeter /usr/local/bin/jmeter
 COPY plugins/ /jmeter/lib/ext/
 
 # Copy MSSQL and PostgreSQL JDBC Drivers
-COPY jdbc/postgresql-9.4.1209.jre7.jar /jmeter/lib/
-COPY jdbc/sqljdbc4.jar /jmeter/lib/
+COPY jdbc/ /jmeter/lib/
+COPY common/ /jmeter/lib/
 
 # Change workdir to /jmeter
 WORKDIR /jmeter