RFR: 8352431: java/net/httpclient/EmptyAuthenticate.java uses "localhost" [v2]

[Volkan Yazici]

> Overhauls `EmptyAuthenticate` to
> 
> - Test all supported HTTP versions (i.e., HTTP/1.1 and HTTP/2)
> - Test both clear-text and SSL
> - Use `HttpServerAdapters.HttpTestServer::create` to avoid host-related problems

Volkan Yazici has updated the pull request incrementally with one additional commit since the last revision:

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24542/files
  - new: https://git.openjdk.org/jdk/pull/24542/files/4c6f542e..7b5c8490

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24542&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24542&range=00-01

  Stats: 8 lines in 1 file changed: 1 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/24542.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24542/head:pull/24542

PR: https://git.openjdk.org/jdk/pull/24542