[BugFix] fix raw_program_optimizer not apply when using amp (#51865)

* fix raw_program_optimizer not apply when using amp

* fix CI

python/paddle/distributed/fleet/meta_optimizers/raw_program_optimizer.py

@@ -68,8 +68,6 @@ class RawProgramOptimizer(MetaOptimizerBase):
             return False
         if self.user_defined_strategy.sharding:
             return False
-        if self.user_defined_strategy.amp:
-            return False
 
         if self.without_graph_optimization:
             return True

python/paddle/fluid/tests/unittests/collective/fleet/test_fleet_amp_meta_optimizer.py

@@ -184,7 +184,7 @@ class TestFleetAMPOptimizer(TestFleetMetaOptimizer):
         applied_meta_list = fleet._get_applied_meta_list()
         applied_graph_list = fleet._get_applied_graph_list()
         print(applied_meta_list, applied_graph_list)
-        self.assertEqual(len(applied_meta_list), 3)
+        self.assertEqual(len(applied_meta_list), 4)
 
         ops = [op.type for op in avg_cost.block.ops]
         outs = [