chore(app-check): deprecation warning for v8 API ahead of future major release

[russellwheatley]

Related issues

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

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[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.

Please upload report for BASE (v8-deprecations@10e618f). Learn more about missing BASE report.

Additional details and impacted files

@@                Coverage Diff                 @@
##             v8-deprecations    #8198   +/-   ##
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  Coverage                   ?   71.37%           
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  Files                      ?      155           
  Lines                      ?     6453           
  Branches                   ?     1475           
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  Hits                       ?     4605           
  Misses                     ?     1727           
  Partials                   ?      121