fix: remove port requirement for supenrode from lumera

[mateeullahmalik]

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[Copilot]

Pull Request Overview

This PR removes the port requirement for supernode registration in lumera by changing the registration API to only require an IP address, with the port being automatically appended using a default value.

• Refactor supernode registration to use IP addresses instead of host:port combinations
• Introduce a default supernode port constant (DefaultSupernodePort = "4444") for consistent port usage
• Update test configurations to use loopback IP addresses with unified port settings

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/system/e2e_cascade_test.go	Updates supernode registration test to pass IP addresses instead of ports
tests/system/config.test-*.yml	Modifies test configurations to use loopback IPs and standardized ports
sdk/net/impl.go	Implements automatic port appending to IP addresses from blockchain data
sdk/config/constants.go	Adds new constant for default supernode port
p2p/kademlia/bootstrap.go	Refactors IP parsing logic into a separate function

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