[Dy2Stat]Add build_strategy in @to_static to support open pass

[Aurelius84]

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PR changes

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Describe

Add build_strategy argument in @to_static to support open pass

A sample code:

build_strategy = paddle.static.BuildStrategy()

class ResNet(nn.Layer):
    def __init__(self, ...):
        # (略)


    #方式一：
    @paddle.jit.to_static(build_strategy=build_strategy)
    def forward(self, x):
        # (略)


resnet = ResNet()
# 方式二：
resnet = paddle.jit.to_static(resnet, build_strategy=build_strategy)

[paddle-bot-old]

Thanks for your contribution!
Please wait for the result of CI firstly. See Paddle CI Manual for details.

[zhwesky2010]

LGTM for adding widnows UT

[XieYunshen]

LGTM for set_tests_properties(test_build_strategy PROPERTIES TIMEOUT 120)

[PangHua]

LGTM