RFR: 8346017: Socket.connect specified to throw UHE for unresolved address is problematic for SOCKS V5 proxy

[Volkan Yazıcı]

[JDK-8343791](https://bugs.openjdk.org/browse/JDK-8343791) modified `Socket::connect` to throw `UHE` on unresolved addresses – merged in #22160. As reported in [JDK-8346017](https://bugs.openjdk.org/browse/JDK-8346017), this renders `connect()` unusable when there is a (SOCKS) proxy in play, where calling `connect()` using unresolved addresses is a valid operation. This PR

1. Reverts the earlier `Socket::connect` change
2. Updates tests accordingly
3. Enhances tests with proxied socket inputs

These changes require CSR and RN tickets. I will implement them once we agree on a solution here.

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Commit messages:
 - Remove `UHE` guard from `Socket::connect`

Changes: https://git.openjdk.org/jdk/pull/22719/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22719&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346017
  Stats: 103 lines in 2 files changed: 64 ins; 11 del; 28 mod
  Patch: https://git.openjdk.org/jdk/pull/22719.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22719/head:pull/22719

PR: https://git.openjdk.org/jdk/pull/22719