feat(datastore): support IndexedDB Adapter on web worker

[tlikits]

Issue #, if available:
#6870

Description of changes:

• Add isWebWorker function to @aws-amplify/core to check if running on web worker or not
• Add isWebWorker condition in DataStore getDefaultAdapter

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

[codecov]

Codecov Report

Merging #6874 into main will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #6874      +/-   ##
==========================================
- Coverage   73.35%   73.34%   -0.02%     
==========================================
  Files         213      213              
  Lines       13153    13159       +6     
  Branches     2470     2568      +98     
==========================================
+ Hits         9649     9651       +2     
+ Misses       3340     3314      -26     
- Partials      164      194      +30     

Impacted Files	Coverage Δ
packages/core/src/JS.ts	91.89% <33.33%> (-3.35%)	⬇️
...ore/src/storage/adapter/getDefaultAdapter/index.ts	75.00% <100.00%> (ø)
packages/auth/src/OAuth/OAuth.ts	56.11% <0.00%> (ø)
packages/core/src/Credentials.ts	31.51% <0.00%> (ø)
packages/analytics/src/Analytics.ts	63.58% <0.00%> (ø)
packages/datastore/src/sync/index.ts	15.41% <0.00%> (ø)
packages/datastore/src/sync/outbox.ts	24.00% <0.00%> (ø)
packages/datastore/src/storage/storage.ts	71.66% <0.00%> (ø)
packages/core/src/OAuthHelper/GoogleOAuth.ts	33.33% <0.00%> (ø)
packages/core/src/Util/Reachability.native.ts	37.50% <0.00%> (ø)
... and 10 more

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[iartemiev]

Looks good! Thank you, @wylfent

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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