Collect diagnostics in Scala 3

[WojciechMazur]

Description

• Port ProtoReporter and DepsTrackingReporter to Scala 3
• Adapt ScalacInvoker to use new reports in Scala 3
• Enable reports tests for Scala 3 (test_scala_version). Mitigate differences in warnings/errors/info reported by Scala 3 and Scala 2 by introducing a dedicated test cases

Additional info:

Would conflict with #1606 in ScalacInvoker for Scala 3
Required workaround for scala/scala3#21533 - we cannot extend ConsoleReporter in Scala 3 directly. I've decided to port exact behaviour of scalac ConsoleReporter to allow for the most identical semantics across different build tools.
I'm also going to remove tech-debt between all 4 implementations of ProtoReporter/ProtocReporter by introducing a common abstraction in the follow-up PR

Motivation

Fixes #1602

[simuons]

Hi, @WojciechMazur, thanks for this PR, looks good to me, sorry for delay. Could you please rebase this PR on master? Then I'll merge it once green.

[WojciechMazur]

Thank you for taking care of that, I've made a rebase.
I'm also preparing a port of dependency_analyzer compiler plugin that is missing for Scala 3. It should finally introduce parity for most of Scala 2 and 3 features and would take advantage of DepsTrackingReporter introduced in this PR.