Add support for "conventional" project names

[melix]

This commit adds the ability to use conventional project names, that is to say project names which start with micronaut-. This allows having publications which artifact id match the project name. Not having this is source of trouble for using composite builds, since Gradle wouldn't be able to determine the substitutions automatically. Changing the project names to match the artifact id fixes this issue, at the cost of some drawbacks:

• full task paths will now use :micronaut-xxx as a prefix, instead of just :xxx
• project dependencies will be broken when this feature is enabled. For example, a dependency on project(":foo") will have to be rewritten to project(":micronaut-foo")

The change is not applied to the root project (which is not published in any case), which will let us preserve the Gradle Enterprise history for that project. It is not applied either to projects which name starts with test-suite.

This feature is disabled by default for now, it needs to be enabled in the settings.gradle file, under the build extension:

micronautBuild {
    useStandardizedProjectNames = true
}

[alvarosanchez]

The only thing I would say is: can you please add a warning statement somewhere if useStandardizedProjectNames is false? So that at least we don't forget we need to enable it at some point.

I'm concerned that it may happen the same as with binary compatibility checks, that we turn them off to move on, and then forget about it forever.