java-24065: repo update for quarkus-vs-springboot/spring-project module

[ehsansasanian]

Module: quarkus-vs-springboot/spring-project

replace 'jasync-r2dbc-mysql' by 'r2dbc-mysql' since it was not compatible with the current spring boot version fix network issues for docker-compose file initialize MySQL by .sql script, instead of initializing it in the backend app remove unused properties for simplifying the pom.xml file