v,breaking: add ability to read enum, fn, interface and sumtype attributes in compile-time, change builtin StructAttribute to VAttribute (#21149)

vlib/db/mysql/mysql_orm_test.v

@@ -51,10 +51,10 @@ fn test_mysql_orm() {
 			name: 'id'
 			typ: typeof[int]().idx
 			attrs: [
-				StructAttribute{
+				VAttribute{
 					name: 'primary'
 				},
-				StructAttribute{
+				VAttribute{
 					name: 'sql'
 					has_arg: true
 					kind: .plain

vlib/db/pg/pg_orm_test.v

@@ -55,13 +55,13 @@ fn test_pg_orm() {
 			default_val: ''
 			is_arr: false
 			attrs: [
-				StructAttribute{
+				VAttribute{
 					name: 'primary'
 					has_arg: false
 					arg: ''
 					kind: .plain
 				},
-				StructAttribute{
+				VAttribute{
 					name: 'sql'
 					has_arg: true
 					arg: 'serial'

vlib/db/sqlite/sqlite_orm_test.v

@@ -36,10 +36,10 @@ fn test_sqlite_orm() {
 			name: 'id'
 			typ: typeof[int]().idx
 			attrs: [
-				StructAttribute{
+				VAttribute{
 					name: 'primary'
 				},
-				StructAttribute{
+				VAttribute{
 					name: 'sql'
 					has_arg: true
 					kind: .plain