8361423: Add IPSupport::printPlatformSupport to java/net/NetworkInterface/IPv4Only.java

[ayushrigal]

This is part of a series of diagnostic output updates to java.net tests to assist in the analysis of failures in IPv6 only environments
for Linux there is not IPv4 configuration but the IPv4 stack remains enabled
For macOS, and windows the IPv4 stacks are disabled, and IPv4 configuration removed

add IPSupport::printPlatformSupport(System.out);

to the start of main

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Issue

• JDK-8361423: Add IPSupport::printPlatformSupport to java/net/NetworkInterface/IPv4Only.java (Enhancement - P4)

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@ayushrigal The following label will be automatically applied to this pull request:

• net

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[myankelev]

Please add a 2025 to the copyright at the top:

 * Copyright (c) 2010, 2025, Oracle and/or its affiliates. All rights reserved.

[myankelev]

Minor: Could you please change the wildcard imports to explicit ones