Fix RunAndListenClient

[dsha256]

Problem

RunAndListenClient: multiple goroutines across multiple runs of RunAndListenClient are reading from the “done” channel, and which one will receive something from that channel – completely random. As a result, in case of a lost connection, some random goroutine will exit and its graceful shutdown functionality will be lost.

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Solution

To avoid such problems, the code should be simple. It’s hard to figure out how this method works because of multiple goroutines
and channels, thus it’s more error-prone. The easier the code, the harder a bug to find a place to hide. This functionality across all the methods and their goroutines can be done with a single context passed from the main. All the goroutines will read from ctx.Done() in select to shutdown gracefully.