Share filterstate between upstream and downstream filters #9896
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Ref: envoyproxy/envoy-wasm#291
Signed-off-by: gargnupur gargnupur@google.com
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Description: Add accessor in streaminfo to access upstream filters filterstate
Risk Level: Low
Testing: Added tests in stream_info and tcp_proxy
Docs Changes:
Release Notes:
[Optional Fixes #Issue]
[Optional Deprecated:]