feat: change to GrpcOrGrpcWebClientChannel.toSeparateEndpoints

[levischechter]

Description

This PR updates GRPCInfo to export a GrpcOrGrpcWebClientChannel channel. This update should support also calls for web-grpc servers (or proxies). For backward compatibility, web host and web port are optional.

Checklist

• [ ] Targeted PR against correct branch.
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Wrote unit tests.
• [ ] Run make format.
• [ ] Run make lint.
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [ ] Re-reviewed Files changed in the Github PR explorer and added meaningful comments.

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.35 :warning:

Comparison is base (e31517c) 76.39% compared to head (9105eb0) 76.04%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## riccardom/replace-grpc-implementation #175 +/- ## ========================================================================= - Coverage 76.39% 76.04% -0.35% ========================================================================= Files 26 26 Lines 665 668 +3 ========================================================================= Hits 508 508 - Misses 157 160 +3 ``` | [Impacted Files](https://codecov.io/gh/alan-sdk/alan.dart/pull/175?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alan-sdk) | Coverage Δ | | |---|---|---| | [lib/wallet/network\_info.dart](https://codecov.io/gh/alan-sdk/alan.dart/pull/175?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alan-sdk#diff-bGliL3dhbGxldC9uZXR3b3JrX2luZm8uZGFydA==) | `53.12% <0.00%> (-2.62%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alan-sdk). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alan-sdk)

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.