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

[ayush]

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

Changes: https://git.openjdk.org/jdk/pull/26265/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26265&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361423
  Stats: 11 lines in 1 file changed: 7 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/26265.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26265/head:pull/26265

PR: https://git.openjdk.org/jdk/pull/26265