fix(submit): Fix TestFlight internal group creation

[EvanBacon]

Why

• Looks like the internal group API changed recently with v3.8.0 [Upgrade] App Store Connect API v3.8.0 EvanBacon/App-Store-Connect-OpenAPI-Spec#25
• We now get an error:

Failed to create an internal TestFlight group. This can be done manually in the App Store Connect website.
UnexpectedAppleResponse: The provided entity includes an attribute with an invalid value - Public link limit cannot be applied to internal group

• Removing the extra properties may fix this, hard to explicitly verify.

How

• Ensure the external TestFlight properties are removed when creating an internal group.

Test Plan

• easd submit -p ios -> creates TF internal group without throwing an error.

[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@szdziedzic, @khamilowicz, @sjchmiela, @radoslawkrzemien

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[github-actions]

Size Change: +764 B (0%)

Total Size: 53.5 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	53.5 MB	+764 B (0%)

_{compressed-size-action}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.65%. Comparing base (918a7f9) to head (57de337).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2906   +/-   ##
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  Coverage   52.65%   52.65%           
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  Files         588      588           
  Lines       23193    23193           
  Branches     4857     4857           
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  Hits        12210    12210           
  Misses      10016    10016           
  Partials      967      967           

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[github-actions]

✅ Thank you for adding the changelog entry!