Bug Fixes

• grpc: fix a bug causing an extra Read from the compressor if a compressed message is the same size as the limit. This could result in a panic with the built-in gzip compressor (#8178)
• xds: restore the behavior of reading the bootstrap config before creating the first xDS client instead of at package init time (#8164)
• stats/opentelemetry: use TextMapPropagator and TracerProvider from TraceOptions instead of OpenTelemetry globals (#8166)
• client: fix races when an http proxy is configured that could lead to deadlocks or panics (#8195)
• client: fix bug causing RPC failures with message "no children to pick from" when using a custom resolver that calls the deprecated NewAddress API (#8149)
• wrr: fix slow processing of address updates that could result in problems including RPC failures for servers with a large number of backends (#8179)