Fix case when cancellation token was requested but query was not canceled

[MAF1N]

When you run a command using TrinoCommand with StatementClientV1 internally, there is an issue if you want to cancel the query from execution on server side. The cancelation token is processed in HttpClient at GetResourceAsync, but since the code around the call area is not covered with any try / catch, the flow of termination of command is dropped and the command continues to run on server side. And all this going on while the code requested this command execution is no longer awaiting for result of it. Thus, it is necessary to catch the exception and call cancelation of server execution of specified command.

The code was unreachable here.

With the proposed code change we will cancel the run of command whenever the cancellation requested.

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