Add Wedge Offset Option to BCO

[AlexCarpenter46]

Proposed changes

This is 3rd PR in the chain that adds the ability to offset the wedges. This PR adds the CubeScale option to BCO domain which will offset the wedge if your CubeScale is larger than 1.0. Specifying CubeScale as 1.0 makes the cube size the initial separation between the two objects.

Upgrade instructions

Add the CubeScale option in the DomainCreator->BinaryCompactObject section like this.

DomainCreator:
  BinaryCompactObject:
    CubeScale: 1.0

Code review checklist

• The code is documented and the documentation renders correctly. Run
  make doc to generate the documentation locally into BUILD_DIR/docs/html.
  Then open index.html.
• The code follows the stylistic and code quality guidelines listed in the
  code review guide.
• The PR lists upgrade instructions and is labeled bugfix or
  new feature if appropriate.

Further comments

This PR depends on #6234 and #6214

[knelli2]

Thanks for doing this! Please add a fixup with these changes

[knelli2]

Looks good. You can squash these last couple things in all together

[AlexCarpenter46]

Squashed @knelli2, thanks for the reviews :)

[knelli2]

Looks good! Squash