chore: add scripts for ios-modelgen e2e test

[phani-srikar]

Description of changes

Issue #, if available

Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)
• Breaking changes to existing customers are released behind a feature flag or major version update
• Changes are tested using sample applications for all relevant platforms (iOS/android/flutter/Javascript) that use the feature added/modified

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Merging #629 (f3d2753) into main (ffd7cf7) will increase coverage by 1.49%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##             main     #629      +/-   ##
==========================================
+ Coverage   84.44%   85.93%   +1.49%     
==========================================
  Files         152      152              
  Lines        6435     7489    +1054     
  Branches     1383     1956     +573     
==========================================
+ Hits         5434     6436    +1002     
- Misses        901      960      +59     
+ Partials      100       93       -7     

see 117 files with indirect coverage changes

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[dpilch]

What is the empty file .codebuild/scripts/run-ios-modelgen-e2e-test.sh?

[phani-srikar]

What is the empty file .codebuild/scripts/run-ios-modelgen-e2e-test.sh?

That's updating the permissions on that script to be executable.