Associate comments on the same line as the closing curly brace with the statement

[Hubro]

Comments on the same line as a closing curly brace should be associated with the statement, much like comments on the same line as a semi-colon is captured in post_comments.

For example:

type enumeration {
  enum foo { value 10; } // Comment associated with "foo"
  enum bar { value 20; } // Comment associated with "bar"
}

Currently the comments are treated as their own nodes, which leads to this formatting:

type enumeration {
  enum foo {
    value 10;
  }
  // Comment associated with "foo"
  enum bar {
    value 20;
  }
  // Comment associated with "bar"
}

Instead, these comments should be captured into post_comments as well, resulting in the following formatting:

type enumeration {
  enum foo { // Comment associated with "foo"
    value 10;
  }
  enum bar { // Comment associated with "bar"
    value 20;
  }
}

This means it's technically possible for the formatter to put two single-line comments on the same line, but that should never happen in practice.