Add verify tests for common model components

[CharlieL7]

• There are common neutral network architectures that we should test separately from an end-to-end model.
• Testing these architectures can make diagnosing future problems much easier since we would be able to independently verify that certain network features work correctly on a stand-alone basis.
• We already have verify tests for model features that we modify in some way in compiler passes.
• Here are some features that we should test (feel free to add more)
  • Bert Transformer
  • Long short term memory (LSTM)
  • Encoder
  • Decoder
  • Autoencoders
  • We can also take snippets of models and create verify tests for them.
  • May want to take a look at ORT tests that also use snippets

[CharlieL7]

Link to the ORT tests of model components: https://github.com/microsoft/onnxruntime/tree/main/onnxruntime/test/python/transformers