Grails Async - Event Transform - References GORM

[jamesfredley]

Issue description

Look at the POM here: https://central.sonatype.com/artifact/org.grails/grails-events-transform

Async still depends on gorm because of this.

We can probably abstract some common interface so async does not have to depend on gorm.

copied from grails/grails-async#177

[jamesfredley]

https://github.com/apache/grails-core/blob/7.0.x/grails-events/transforms/build.gradle#L33-L39