chore: if return databend-query err should exit client

[TCeason]

Test:

in main branch:

If databend-query not start, bendsql not exit.

➜  bendsql git:(main) cargo build --bin bendsql && ./target/debug/bendsql --query='select 1'
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
Error: APIError: RequestError: error sending request for url (http://localhost:8000/v1/query)
➜  bendsql git:(main) cargo build --bin bendsql && ./target/debug/bendsql                   
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
Welcome to BendSQL 0.22.2-b6f550d(2024-10-30T03:05:49.669884189Z).
Connecting to localhost:8000 as user root.
Connected to 
Started web server at 127.0.0.1:8080

:) select 1;
error: APIError: RequestError: error sending request for url (http://localhost:8000/v1/query)