refmt comment reordering

Looks like when we print multiple comments next to each other we are flipping the order.

In my case i'm working on an existing file and commenting out code until i'm ready to use it which means i sometimes have two comments directly next to each other but after a format the order gets flipped (which in my case messes up the meaning of the code).

Code:

switch "" {
  | a => a
  /*
  | 1 => b *//*
  | 2 => c */
};

Prints as:

switch "" {
| a => a /*
  | 2 => c */ /*
  | 1 => b */
};

Start by reproducing the example with refmt and inspect the formatter path that handles adjacent block comments. The change is complete when formatting preserves the original order of the two comments; add regression coverage using the provided switch example if the existing test structure is found.