test: add RN E2E test based on detox framework

[AllanZhengYP]

A sample RN app that confirms clients(currently only S3) works fine in RN 0.60. Please review tests/react-native/End2End/README.md for the steps to run this test.

@trivikr @alexforsyth Please checkout this branch and confirm for me whether you can run the tests locally.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[alexforsyth]

LGTM!

[codecov-commenter]

Codecov Report

Merging #1383 into master will increase coverage by 0.50%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1383      +/-   ##
==========================================
+ Coverage   79.08%   79.58%   +0.50%     
==========================================
  Files         287      297      +10     
  Lines       11155    11342     +187     
  Branches     2360     2418      +58     
==========================================
+ Hits         8822     9027     +205     
+ Misses       2333     2315      -18     

Impacted Files	Coverage Δ
packages/util-create-request/src/index.ts	100.00% <0.00%> (ø)
packages/middleware-signing/src/middleware.ts	91.66% <0.00%> (ø)
...iddleware-sdk-s3-control/src/prepend-account-id.ts	86.95% <0.00%> (ø)
...re-bucket-endpoint/src/bucketEndpointMiddleware.ts	91.30% <0.00%> (ø)
...dk-transcribe-streaming/src/middleware-endpoint.ts	95.23% <0.00%> (ø)
...edential-provider-imds/src/fromInstanceMetadata.ts
...rovider-imds/src/remoteProvider/ImdsCredentials.ts
...al-provider-imds/src/remoteProvider/httpRequest.ts
...dential-provider-imds/src/fromContainerMetadata.ts
...ider-imds/src/remoteProvider/RemoteProviderInit.ts
... and 18 more

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