change: Add image configs and region config for TPE (ap-east-2)

[IshaChid76]

Issue #, if available:

Description of changes:

• This PR adds config for the new region (TPE) that is in the process for RBA for Jumpstart.
  Testing done:

Merge Checklist

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General

• I have read the CONTRIBUTING doc
• I certify that the changes I am introducing will be backward compatible, and I have discussed concerns about this, if any, with the Python SDK team
• I used the commit message format described in CONTRIBUTING
• I have passed the region in to all S3 and STS clients that I've initialized as part of this change.
• I have updated any necessary documentation, including READMEs and API docs (if appropriate)

Tests

• I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have added unit and/or integration tests as appropriate to ensure backward compatibility of the changes
• I have checked that my tests are not configured for a specific region or account (if appropriate)
• I have used unique_name_from_base to create resource names in integ tests (if appropriate)
• If adding any dependency in requirements.txt files, I have spell checked and ensured they exist in PyPi

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[varunmoris]

are we sure neuronx is regionalized here? We had this issue before where we are adding regions that don't contain the images

[e-davidson]

This should be fixed in the regionalizer, otherwise this will block new regions.

[varunmoris]

Neuronx has a specific regionalization process that we own. We own the region list that neuronx will be regionalized to. If that did not update, we should not update this as customers would expect the image to be in that region when it isn't