fix: remove artemis support from list of supported platforms of activemq

[schmikei]

Description

The MBean targets are different between base ActiveMQ and Artemis ActiveMQ

ActiveMQ MBeans

Artemis Process MBeans

The target system of activemq is not going to be looking for artemis metrics

Related issue

Resolves #1857

Potentially #1856

How has this been tested?

This is a documentation change as the listed support should not have been added in the first place.

Checklist:

• Unit tests
  • Unit tests do not apply.
  • Unit tests have been added/modified and passed for this PR.
• Integration tests
  • Integration tests do not apply.
  • Integration tests have been added/modified and passed for this PR.
• Documentation
  • This PR introduces no user visible changes.
  • This PR introduces user visible changes and the corresponding documentation change has been made.
• Minor version bump
  • This PR introduces no new features.
  • This PR introduces new features, and there is a separate PR to bump the minor version since the last release already.
  • This PR bumps the version.