Rename resource `sonatyperepo_task_repository_maven_remove_snapshots`

[marknl]

Maybe rename the resource sonatyperepo_task_repository_maven_remove_snapshots to sonatyperepo_task_repository_maven2_remove_snapshots as well, to be in line with the changes introduced in 1.0.0

https://registry.terraform.io/providers/sonatype-nexus-community/sonatyperepo/latest/docs/resources/task_repository_maven_remove_snapshots

[madpah]

Fair point @marknl - I'll flag this for the next breaking-changes release.