Publisher/Subscriber fail to connect

[elfenpiff]

Required information

Operating system:
Linux 6.7.3-arch1-2

Rust version:
rustc 1.76.0 (07dca489a 2024-02-04)

Cargo version:
rustc 1.76.0 (07dca489a 2024-02-04)

iceoryx2 version:
main branch

Fix:
The methods Publisher|Subscriber::populate_{subscriber|publisher}_channels() both had the problem that when the corresponding port goes out of scope and is replaced with a new port, that this is not detected and the old connection is kept.

Observed result or behaviour:
When either a publisher or subscriber is already running, and a new counterpart is started (subscriber/publisher) they sometimes fail to connect. This can be fixed when another publisher or subscriber is connecting - it seems that the ports are sometimes not informed about new participants.

Expected result or behaviour:
Connecting ports always works

Conditions where it occurred / Performed steps:
Start a single publisher and start stop subscriber multiple times with some time in between.