Rely on native TLS 1.3 and modern JSSE for the TLS-by-default work

TlsSocketPlugin still requests SSLContext.getInstance("TLS") and ConnectionHelper documents TLS 1.1 era defaults. With Java 17, TLS 1.3 and the current JSSE cipher defaults are always present.

• Make TLS 1.3 and 1.2 the default enabledSslProtocolSuites and remove the workarounds for older suites.
• Review the enabledSslCipherSuites defaults and sslMode handling against JDK 17 behaviour, including hostname verification through SSLParameters.setEndpointIdentificationAlgorithm.
• Update the TLS tests and the security documentation accordingly.