Update to allow large models to be checked for mobile support. (#18357)
### Description
<!-- Describe your changes. -->
Update usability checker and related infrastructure to support checking
models > 2GB.
- Add ability to set flag to keep initializers as external data
- we optimize the model as part of the checking so need to write out a
new copy.
- Handle issue with ONNX shape inferencing silently failing
- use API that supports large models but requires writing the model to a
new file
- automate cleanup of that copy of the model
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Allow analysis of LLMs to determine gaps for mobile usage.
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Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>