test: add sslv2 client hello test w/ jvm

[jmayclin]

Description of changes:

Based on feedback from #5011 , this PR instead adds an SSLv2 integration using the integrationv2 style.

Testing:

I examined the ClientHello with wireshark and added a debug statement to confirm that the ClientHello that the java client was sending was ClientHello SSLv2.

ubuntu@ip-1-1-1-1:~/workspace/s2n-tls/tests/integrationv2$ uv run pytest --provider-version openssl-3 --best-effort-NOT-FOR-CI -x -rpfs test_sslv2_client_hello.py
============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.3.4, pluggy-1.5.0
rootdir: /home/ubuntu/workspace/s2n-tls/tests/integrationv2
configfile: pyproject.toml
plugins: xdist-3.6.1, rerunfailures-15.0
collected 1 item                                                               

test_sslv2_client_hello.py .                                             [100%]

=========================== short test summary info ============================
PASSED test_sslv2_client_hello.py::test_s2n_server_sslv2_client_hello
============================== 1 passed in 0.62s ===============================

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[dougch]

Corretto 17 doesn't like this...

Command line: java -classpath bin SSLSocketClient 8002 ../pems/rsa_2048_sha256_client_cert.pem TLS_RSA_WITH_AES_256_CBC_SHA256 TLS1.2 S S L v 2 H e l l o
Exit code: 0
Stdout: 
Stderr: java.lang.IllegalArgumentException: Unsupported protocolS
        at java.base/sun.security.ssl.ProtocolVersion.namesOf(ProtocolVersion.java:292)
        at java.base/sun.security.ssl.SSLSocketImpl.setEnabledProtocols(SSLSocketImpl.java:361)
        at SSLSocketClient.main(SSLSocketClient.java:38)

Which jdk are you using/expecting ? and do we need a way to account for max(java --version) ?

[dougch]

passes locally on my arm nix host 👍