fix(tests): use pending_c_parser when needed

test/functional/treesitter/utils_spec.lua

@@ -4,12 +4,16 @@ local clear = helpers.clear
 local insert = helpers.insert
 local eq = helpers.eq
 local exec_lua = helpers.exec_lua
+local pending_c_parser = helpers.pending_c_parser
 
 before_each(clear)
 
 describe('treesitter utils', function()
-  clear()
+  before_each(clear)
+
   it('can find an ancestor', function()
+    if pending_c_parser(pending) then return end
+
     insert([[
       int main() {
         int x = 3;