feat(amplify-category-auth): add HostedUI custom domain in metadata

[vic-blt]

Fix #1880

HostedUIDomain equals to either the domain prefix or the custom domain defined in the user pool.
However we need to differentiate a custom domain from a domain prefix for the config put in aws-exports.js

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 #6499 (a21f00e) into master (39dfd27) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           master    #6499    +/-   ##
========================================
  Coverage   57.28%   57.28%            
========================================
  Files         479      479            
  Lines       21695    21695            
  Branches     4096     4312   +216     
========================================
  Hits        12429    12429            
+ Misses       8405     8385    -20     
- Partials      861      881    +20     

Impacted Files	Coverage Δ
...c/provider-utils/awscloudformation/import/index.ts	5.08% <ø> (ø)
...mplify-frontend-ios/lib/frontend-config-creator.js	16.66% <0.00%> (ø)
packages/amplify-util-mock/src/api/api.ts	0.00% <0.00%> (ø)
packages/graphql-mapping-template/src/print.ts	35.29% <0.00%> (ø)
packages/amplify-util-mock/src/storage/storage.ts	0.00% <0.00%> (ø)
...ges/amplify-util-mock/src/CFNParser/stack/index.ts	0.00% <0.00%> (ø)
...es/amplify-util-mock/src/api/resolver-overrides.ts	0.00% <0.00%> (ø)
...es/graphql-transformer-core/src/stripDirectives.ts	35.29% <0.00%> (ø)
.../amplify-cli-core/src/state-manager/pathManager.ts	67.44% <0.00%> (ø)
.../amplify-util-mock/src/utils/lambda/loadMinimal.ts	0.00% <0.00%> (ø)
... and 11 more

---

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[doc-l]

Any ETA on when this can be merged? This would be great and it looks like the work is already done...

[doc-l]

bump?

[vic-blt]

@edwardfoyle any news on this ?

[aws-eddy]

Hey @vic-blt, would you be interested in continuing to work on this PR? If so, please rebase this onto dev by running git rebase dev. We will help you with getting this PR to the finish line 🏁

[codecov-commenter]

Codecov Report

Merging #6499 (d1ac574) into dev (ec9a2ba) will increase coverage by 47.58%.
The diff coverage is 46.42%.

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@@             Coverage Diff             @@
##              dev    #6499       +/-   ##
===========================================
+ Coverage    0.00%   47.58%   +47.58%     
===========================================
  Files        1296      843      -453     
  Lines      149743    38370   -111373     
  Branches     1296     7852     +6556     
===========================================
+ Hits            0    18257    +18257     
+ Misses     148447    18481   -129966     
- Partials     1296     1632      +336     

Impacted Files	Coverage Δ
...ify-category-function/src/events/prePushHandler.ts	33.33% <0.00%> (+33.33%)	⬆️
...lify-category-hosting/lib/S3AndCloudFront/index.js	89.65% <ø> (+89.65%)	⬆️
...s/amplify-cli-core/src/errors/amplify-exception.ts	82.35% <ø> (+82.35%)	⬆️
packages/amplify-cli-core/src/types.ts	100.00% <ø> (+100.00%)	⬆️
packages/amplify-cli/src/commands/console.ts	0.00% <0.00%> (ø)
packages/amplify-cli/src/commands/pull.ts	0.00% <0.00%> (ø)
...mplify-frontend-ios/lib/frontend-config-creator.js	15.02% <0.00%> (+15.02%)	⬆️
...ider-awscloudformation/src/display-helpful-urls.ts	25.42% <0.00%> (+25.42%)	⬆️
...y-provider-awscloudformation/src/push-resources.ts	20.73% <0.00%> (+20.73%)	⬆️
...c/extensions/amplify-helpers/auth-notifications.ts	41.00% <4.34%> (+41.00%)	⬆️
... and 21 more

... and 1275 files with indirect coverage changes

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[vic-blt]

@evcodes I rebased onto dev.

[aws-eddy]

Thank you, I am running the changes through our e2e test suite

[aws-eddy]

This looks good to me. Thank you!

[fossamagna]

@evcodes @goldbez
When do you plan to merge this RP?
This RP change only supports AMPLIFY auth import.
If this RP is merged, I would willing to create an RP that adds support for custom domains via amplify auth add/amplify auth update.