Unify SSL support

[philwebb]

We currently have SSL configuration available in:

• ServerProperties
• CouchbaseProperties
• KafkaProperties
• RabbitProperties

In addition we've had a request to add them to ActiveMQProperties.

It feels like there would be some benefit in trying to unify our support.

Related issues:

• Provide centralized configuration of SSL properties #34814
• Add SSL bundle support to Cassandra auto-configuration #25602
• Add SSL bundle support to Couchbase auto-configuration #34811
• Add SSL bundle support to Redis auto-configuration #34815
• Provide configuration properties for configuring an ActiveMQ connection factory that uses SSL #17365
• Provide properties for configuring JDBC connections with SSL #34817
• Add SSL bundle support to MongoDB auto-configuration #35042
• Add SSL bundle support to WebClient auto-configuration #18556
• Add SSL bundle support to RestTemplateBuilder auto-configuration #34810
• Support using ResourceLoader to load SSL keystore and truststore #34839
• Add SSL bundle support to Elasticsearch auto-configuration #35155
• Add SSL bundle support to RabbitMQ auto-configuration #37833
• Add SSL bundle support to Apache Kafka auto-configuration #37629

[mp911de]

There's probably more such as Lettuce and Jedis (Redis Drivers).

[wilkinsona]

And Cassandra too.

[philwebb]

@asaikali might have some sample code that shows common things that need to be configured for SSL