Executable JVM Param

[gustavoms11]

Hello!

I am doing a migration from JDK 8 to JDK 17 in a project and trying to keep grails in JDK 8 so we can do it in parts. However grails plugin always use the JDK in JAVA_HOME. The maven compiler plugin let me set the JDK in the executable param, I wish I had the same in the grails plugin.