interop/xds: Increase go log verbosity to 99 so that EDS is logged (v1.56.x backport) (grpc#6878)

Co-authored-by: Sergii Tkachenko <[email protected]>

Author: XuanWang-Amos

interop/xds/client/Dockerfile

@@ -31,7 +31,7 @@ RUN go build -tags osusergo,netgo interop/xds/client/client.go
 # reduces the docker image size.
 FROM alpine
 COPY --from=build /go/src/grpc-go/client .
-ENV GRPC_GO_LOG_VERBOSITY_LEVEL=2
+ENV GRPC_GO_LOG_VERBOSITY_LEVEL=99
 ENV GRPC_GO_LOG_SEVERITY_LEVEL="info"
 ENV GRPC_GO_LOG_FORMATTER="json"
 ENTRYPOINT ["./client"]

interop/xds/server/Dockerfile

@@ -31,7 +31,7 @@ RUN go build -tags osusergo,netgo interop/xds/server/server.go
 # reduces the docker image size.
 FROM alpine
 COPY --from=build /go/src/grpc-go/server .
-ENV GRPC_GO_LOG_VERBOSITY_LEVEL=2
+ENV GRPC_GO_LOG_VERBOSITY_LEVEL=99
 ENV GRPC_GO_LOG_SEVERITY_LEVEL="info"
 ENV GRPC_GO_LOG_FORMATTER="json"
 ENTRYPOINT ["./server"]