[Release-1.5] Add ClusterInfo as a property in StreamInfo (#10432)

[gargnupur]

Add ClusterName as a property in StreamInfo. This is because for TCP, there is no RouteEntry and thus we are not able to get clustername for TCP in scenarios where upstream cluster is not healthy

Risk Level: Low
Testing: Unit Tests
Docs Changes:
Release Notes:

Signed-off-by: gargnupur gargnupur@google.com
Co-authored-by: Matt Klein mattklein123@gmail.com

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Description: git cherry-pick 9186ebf (from envoyproxy/envoy)
Risk Level:
Testing:
Docs Changes:
Release Notes:
[Optional Fixes #Issue]
[Optional Deprecated:]

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[gargnupur]

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[kyessenov]

I don't have permissions to merge.