Make links to classes in terminal clickable.

[PawelWozniak]

Current behaviour

When you run validation of the deployment, there are results shown in the terminal.
Cut out form those results:

Test Failures [1]
• Sch_Opportunity_Test.test_notifyOpportunityOwnerThatItIsTooLongInTheStage
  message: System.NullPointerException: Attempt to de-reference a null object
  stacktrace:
    Class.Sch_Opportunity.prepareEmailMessage: line 280, column 1
    Class.Sch_Opportunity.notifyOpportunityOwnerThatItIsTooLongInTheStage: line 215, column 1
    Class.Sch_Opportunity_Test.test_notifyOpportunityOwnerThatItIsTooLongInTheStage: line 116, column 1

When you hold the control key and click on Class.Sch_Opportunity.prepareEmailMessage then VSCode try to parse but it is not working.

At the top you can see then this:

But it don't understand that and can't open the class.

Expected behaviour
When you click on such link, then file is opened and the cursor goes to the given position.

Similar to #6088