【AMP OP&Test】update bfp16 & fp16 unit test for concat op. (#52357)

* update bfp16 & fp16 test.

* update.

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Co-authored-by: NRoc <lrslj@live.com>

python/paddle/fluid/tests/unittests/test_concat_op.py

@@ -296,7 +296,13 @@ def create_test_bf16(parent):
     globals()[cls_name] = TestConcatBf16
 
 
+# add all unit test maybe timeout.
 create_test_bf16(TestConcatOp)
+create_test_bf16(TestConcatOp2)
+# create_test_bf16(TestConcatOp3)
+create_test_bf16(TestConcatOp4)
+# create_test_bf16(TestConcatOp5)
+# create_test_bf16(TestConcatOp6)
 
 
 class TestConcatOpError(unittest.TestCase):