Example with bare tls magic

[ignasi35]

Sample using AkkaTlsMagicSSLEngineProvider without any refactor.

This is to compare the original ConfigSSLEngineProdicer wth AkkaTlsMagicSSLEngineProvider. Here's a few details:

• differences in settings (enable/disable hostname verification, enable/disable mTLS)
• duplicate code

[ignasi35]

@raboof I've simplified the code:

• removed the new ConfigSSLEngineProvider
• undeprecate the old ConfigSSLEngineProvider
• remove the SSLFactory class introduced in [WIP] Implement k8s-friendly SSLEngineProvider akka/akka#29061
• removed some no-longer-necessary abstractions (e.g. ManagersProviders)

Then, I've extracted a few bits and pieces from AkkaTLSMagicSSLEngineProvider to separate classes.

Finally, I've introduced SSLEngineConfig (related to the discussion in raboof#2 (comment)) and used it in both AkkaTLSMagicSSLEngineProvider and the old ConfigSSLEngineProvider.

The most important detail on this last commit is that now there are only two EngineProvider implementations and only one of them support key rotation.

[ignasi35]

superseded by akka#29152