onnxruntime

add SAVE_TEST_GRAPH macro (#18696)

### Description
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Add a macro `SAVE_TEST_GRAPH ` in `graph_transform_test_builder.cc`. 


### Motivation and Context
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- If it fixes an open issue, please link to the issue here. -->

This will help us debug the graph and Unitest.

Co-authored-by: ruiren <ruiren@microsoft.com>