handling IllegalArgumentException caused by Discovery Disabled Nodes in Endpoint.fromEnode

[vaidikcode]

PR description

This PR modifies the Endpoint.fromEnode method to handle cases where discovery is disabled for a given EnodeURL more gracefully. Previously, the method threw an IllegalArgumentException when getDiscoveryPort returned an empty Optional, leading to potential disruptions in the system.

Fixed Issue(s)

#7887

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