8355578: [java.net] Use @requires tag instead of exiting based on "os.name" property value

[vy]

Replaces os.name checks in tests with @requires. This prevents these tests from being run, and superficial results being generated, on unnecessary platforms.

Note that os.name checks are replaced with os.family instead.

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Issue

• JDK-8355578: [java.net] Use @requires tag instead of exiting based on "os.name" property value (Sub-task - P4)

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• 01: Full - Incremental (242f0787)
• 00: Full (f468738c)