Client sets max_execution_time, which is incompatible with read-only mode

[bobrik]

Here's where the setting is set:

clickhouse-go/context.go

Lines 238 to 240 in c5bccc8

	if sec := time.Until(deadline).Seconds(); sec > 1 {
	opt.settings["max_execution_time"] = int(sec + 5)
	}

Here's where the time out is confiugred:

clickhouse-go/clickhouse.go

Lines 304 to 305 in c5bccc8

	ctx, cancel := context.WithTimeoutCause(ctx, ch.opt.DialTimeout, ErrAcquireConnTimeout)
	defer cancel()

Here's the error I'm getting:

failed to query server hello: failed to query server hello info: sendQuery: [HTTP 500] response body: "Code: 164. DB::Exception: Cannot modify 'max_execution_time' setting in readonly mode. (READONLY)

The only way to work around this currently is setting the dial timeout to less than 1s.