Update dependency org.codehaus.gmavenplus:gmavenplus-plugin to v3

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.codehaus.gmavenplus:gmavenplus-plugin (source)	`2.1.0` -> `3.0.0`

Release Notes

groovy/GMavenPlus

### [`v3.0.0`](https://togithub.com/groovy/GMavenPlus/releases/tag/3.0.0) [Compare Source](https://togithub.com/groovy/GMavenPlus/compare/2.1.0...3.0.0) #### Bugs - \[[#244](https://togithub.com/groovy/GMavenPlus/issues/244)] Fix Maven plugin validation warnings. #### Enhancements - \[[#239](https://togithub.com/groovy/GMavenPlus/issues/239)] Require Maven 3.2.5. #### Potentially breaking changes Maven's [compatibility plan](https://maven.apache.org/developers/compatibility-plan.html) marked Maven versions older than 3.2.5 as EOL in March 2023. Therefore, we now require 3.2.5 to move forward with the rest of the ecosystem. #### Notes Fixing the validation warnings removed some Maven dependencies from the plugin's classpath (instead of using the ones from Maven itself). I'm not aware of any negative consequences of this, but it's possible certain specialized use cases might encounter changes in behavior.