fmt: fix removal of comment before embed in struct (#11384)

vlib/v/fmt/struct.v

@@ -57,11 +57,16 @@ pub fn (mut f Fmt) struct_decl(node ast.StructDecl) {
 	for embed in node.embeds {
 		f.mark_types_import_as_used(embed.typ)
 		styp := f.table.type_to_str_using_aliases(embed.typ, f.mod2alias)
-		if embed.comments.len == 0 {
+
+		pre_comments := embed.comments.filter(it.pos.pos < embed.pos.pos)
+		comments := embed.comments[pre_comments.len..]
+
+		f.comments_before_field(pre_comments)
+		if comments.len == 0 {
 			f.writeln('\t$styp')
 		} else {
 			f.write('\t$styp')
-			f.comments(embed.comments, level: .indent)
+			f.comments(comments, level: .indent)
 		}
 	}
 	mut field_align_i := 0

vlib/v/fmt/tests/struct_embed_keep.vv

@@ -5,7 +5,9 @@ struct Foo {
 struct Test {}
 
 struct Bar {
+	// comment before Fooo
 	Foo // comment for Foo
+	// comment before Test
 	Test // comment for Test
 	// another comment for Test
 	y int

vlib/v/parser/struct.v

@@ -181,7 +181,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 				// struct embedding
 				type_pos = p.tok.position()
 				typ = p.parse_type()
-				ecomments := p.eat_comments()
+				comments << p.eat_comments()
 				type_pos = type_pos.extend(p.prev_tok.position())
 				if !is_on_top {
 					p.error_with_pos('struct embedding must be declared at the beginning of the struct body',
@@ -203,7 +203,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 				embeds << ast.Embed{
 					typ: typ
 					pos: type_pos
-					comments: ecomments
+					comments: comments
 				}
 			} else {
 				// struct field