runtime: avoid extra indentation on Go switches

Unlike other languages, in Go, switches themselves are not indented;
it's just each case body which is indented by one level:

   switch foo {
   case "bar":
      baz()
   }

As such, we shouldn't @indent for type_switch_statement nor
expression_switch_statement, as otherwise inserted lines show up as:

   switch foo {
      // inserted with "o"
   case "bar":
         // inserted with "o"
      baz()
   }

We can remove the added special cases to properly unindent switches,
as now we're not indenting them at all.

With the fix, the inserted lines are indented properly:

   switch foo {
   // inserted with "o"
   case "bar":
      // inserted with "o"
      baz()
   }

I also verified that indentation on selects similarly works well.

Fixes #6772.

runtime/queries/go/indents.scm

@@ -14,15 +14,10 @@
   (argument_list)
   (field_declaration_list)
   (block)
-  (type_switch_statement)
-  (expression_switch_statement)
   (var_declaration)
 ] @indent
 
 [
   "]"
   ")"
 ] @outdent
-
-((_ "}" @outdent) @outer (#not-kind-eq? @outer "select_statement"))
-(communication_case) @extend