Improve logging in build time analytics

[gsmet]

At the moment, the logging in build time analytics is not very satisfactory and doesn't look very good.

While not very important for debug messages, this is IMHO important for confirmation messages sur as [info] [Quarkus build analytics] Quarkus Build Analytics disabled by the user..

For now it looks like this:

[quarkus-bot]

/cc @ebullient (metrics,micrometer), @jmartisk (metrics)