【cherry-pick】Add jacobian and hessian (#53304)

* cherry pick

* remove 1 unitest of Hessian for numerical result is wrong

* remove 1 unitest of Hessian for numerical result is wrong

* refine docstring; remove incubate usage in autograd.py

python/paddle/autograd/__init__.py

@@ -18,12 +18,15 @@ from ..fluid.dygraph.base import no_grad_ as no_grad  # noqa: F401
 from ..fluid.dygraph.base import is_grad_enabled  # noqa: F401
 from ..fluid.dygraph.base import set_grad_enabled  # noqa: F401
 from . import backward_mode  # noqa: F401
+from .autograd import jacobian, hessian  # noqa: F401
 from .backward_mode import backward  # noqa: F401
 from .py_layer import PyLayer  # noqa: F401
 from .py_layer import PyLayerContext  # noqa: F401
 from .saved_tensors_hooks import saved_tensors_hooks
 
 __all__ = [  # noqa
+    'jacobian',
+    'hessian',
     'backward',
     'PyLayer',
     'PyLayerContext',

test/autograd/CMakeLists.txt

@@ -15,6 +15,7 @@ foreach(TEST_OP ${TEST_OPS})
   py_test_modules(${TEST_OP} MODULES ${TEST_OP} ENVS ${GC_ENVS})
 endforeach()
 
+set_tests_properties(test_autograd_dynamic PROPERTIES TIMEOUT 100)
 set_tests_properties(test_autograd_functional_dynamic PROPERTIES TIMEOUT 200)
 set_tests_properties(test_autograd_functional_static PROPERTIES TIMEOUT 160)
 set_tests_properties(test_minimize PROPERTIES TIMEOUT 60)