No option to insert space in compound literal

After #180179, there is still no option to bring back the insertion of the space back into compound literals. Ideally, an option like `SpaceAfterCompoundLiteralType` should be introduced to bring this behavior back.

Start by reviewing issue #180179 and the existing compound-literal spacing behavior in the formatter. Locate the related option handling and tests, then add coverage for the proposed setting. Done means the option restores insertion of a space after the compound literal type without changing unrelated formatting.

Written by the indexing model from the issue text.