Skip expensive ql tests on miri [skip ci]

server/src/engine/ql/tests/schema_tests.rs

@@ -273,6 +273,7 @@ mod layer {
     }
 
     #[test]
+    #[cfg(not(miri))]
     fn fuzz_layer() {
         let tok = b"
             list {

server/src/engine/ql/tests/structure_syn.rs

@@ -188,6 +188,7 @@ mod dict {
     }
 
     #[test]
+    #[cfg(not(miri))]
     fn fuzz_dict() {
         let tok = b"
             {