Fix: Formatting within the IDE wasn't working anymore

[MikaelMayer]

This PR fixes #4269 and fixes #4270
I first added unit tests for the cases that were failing. What really solved the issue was that I had to implement proper cloning for

• methods, that were not keeping BodyStartTok
• formals, that were not keeping RangeToken

Then I also added for all formatting test a case when it tries to clone all members before formatting, like VSCode does, which unveiled 3 more formatting issues:

method Test() {
  g := new ClassName.ConstructorName(
      argument1b, // Two extra spaces
      argument2b,
      argument3b
    );
  var g := new ClassName.ConstructorName(
           argument1, // Missing two extra spaces (when block mode activated)
           argument2,
           argument3
         );
...
  && unchanged(
       this,
       c
     )
     && old( // Extra undesired space here
         c.c
       ) == c.c
  && fresh(
       c.c
     )

I also solved the above issues by:

• Ensuring the RangeToken of TypeRHS is preserved after cloning by modifying its topmost cloning parent AssignmentRHS
• Ensure we iterate on pre resolved children to get OwnedToken (otherwise some cloned expressions were crashing)
• Ensure UnchangedExpr is cloned with the same pattern as everyone else (otherwise the RangeToken wasn't kept)

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

[keyboardDrummer]

The call to base already does RangeToken = cloner.Range(original.RangeToken);, so this line seems obsolete

[keyboardDrummer]

Could you rename m to original?

[keyboardDrummer]

Looks great, just one request for change :)