1.x nightly builds seeing lots of issues with SSL Renegotiation tests

[pjfanning]

https://github.com/apache/pekko/actions/workflows/nightly-1.5-builds.yml

These tests are failing in PR builds too.

They have been removed in main branch because recent JDKs no longer even support this.

Failures look like:

[02-24 00:55:17.781] [info]   - must work in mode ClientInitiates while sending SessionRenegotiationFirstOne *** FAILED *** (14 milliseconds)
[02-24 00:55:17.782] [info]     javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
[02-24 00:55:17.783] [info]     at java.base/sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:163)
[02-24 00:55:17.784] [info]     at java.base/sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:103)
[02-24 00:55:17.784] [info]     at java.base/sun.security.ssl.TransportContext.kickstart(TransportContext.java:252)
[02-24 00:55:17.785] [info]     at java.base/sun.security.ssl.SSLEngineImpl.beginHandshake(SSLEngineImpl.java:107)
[02-24 00:55:17.786] [info]     at org.apache.pekko.stream.impl.io.TLSActor.setNewSessionParameters(TLSActor.scala:185)
[02-24 00:55:17.836] [info]     at org.apache.pekko.stream.impl.io.TLSActor$ChoppingBlock.chopInto(TLSActor.scala:115)
[02-24 00:55:17.837] [info]     at org.apache.pekko.stream.impl.io.TLSActor.doOutbound(TLSActor.scala:335)
[02-24 00:55:17.837] [info]     at org.apache.pekko.stream.impl.io.TLSActor.$anonfun$bidirectional$1(TLSActor.scala:247)