Make sure that UDP transports remain open when UDP listener is closed

[OlivierHecart]

No description provided.

[github-actions]

PR missing one of the required labels: {'dependencies', 'bug', 'new feature', 'documentation', 'enhancement', 'internal', 'breaking-change'}

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
23	1	22	0

View the top 1 failed test(s) by shortest run time

zenoh::tests::link_weights::test_link_weights_info_diamond_peers

Stack Traces | 4.02s run time

thread 'tests::link_weights::test_link_weights_info_diamond_peers' panicked at .../src/tests/link_weights.rs:321:46:
called `Result::unwrap()` on an `Err` value: Can not create a new TCP listener bound to tcp/127.0.0.1:35004: [127.0.0.1:35004: Address already in use (os error 98) at .../zenoh-link-commons/src/tcp.rs:47.] at .../zenoh-link-tcp/src/unicast.rs:338.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

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[Mallets]

If it should fail and we are expecting a different timeout, I rather change the timeout in the config.
The expected error should be clear and not ambiguous.

E.g., I would rather explicitly set the open_timeout config parameter to ensure the timeout happens internally and the open_transport_unicast() returns an error.

zenoh/DEFAULT_CONFIG.json5

Line 450 in 0e0c5d9

open_timeout: 10000,