Statically compile groovy

[samrocketman]

Makes it a little faster and reduces dependencies. Enables use within graalvm.

https://github.com/oracle/graal/issues/1016#event-2181586809

import groovy.transform.CompileStatic
withConfig(configuration) {
    ast(CompileStatic)
}

https://stackoverflow.com/questions/29609130/when-why-would-i-want-to-use-groovys-compilestatic