Branch main fails for Galactic

[AlexGisi]

At the time of 70aa7c9, bt_service_node.hpp fails to build for galactic due to line 267,

future_response_ = service_client_->async_send_request(request).share();

In galactic, async_send_request() returns a shared_future, so further calling .share() invokes an error (reference).

Removing the call to .share() resolved the error.

[facontidavide]

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