Fix time op now that it is no longer experimental (#21318)

I forgot this in my original PR
#21310

Author: ilevkivskyi

mypyc/primitives/librt_time_ops.py

@@ -9,6 +9,5 @@
     return_type=float_rprimitive,
     c_function_name="LibRTTime_time",
     error_kind=ERR_MAGIC_OVERLAPPING,
-    experimental=True,
     dependencies=[LIBRT_TIME],
 )

mypyc/test-data/irbuild-time.test

@@ -26,14 +26,7 @@ def get_time() -> float:
     return time()
 [out]
 def get_time():
-    r0 :: dict
-    r1 :: str
-    r2, r3 :: object
-    r4 :: float
+    r0 :: float
 L0:
-    r0 = __main__.globals :: static
-    r1 = 'time'
-    r2 = CPyDict_GetItem(r0, r1)
-    r3 = PyObject_Vectorcall(r2, 0, 0, 0)
-    r4 = unbox(float, r3)
-    return r4
+    r0 = LibRTTime_time()
+    return r0