Closes gh-11036

* Fix the endpoint prefix for generated metadata.
* Polish and improve configuration key descriptions.

Closes gh-10176

Update `RedisProperties` to use an actual String[] for sentinal nodes
rather than a simple String. This allows us to lean on the updated
binder to automatically trim the elements.

Fixes gh-11029

Update endpoint code to provide cleaner separation of concerns.
Specifically, the top level endpoint package is no longer aware of
the fact that JMX and HTTP are ultimately used to expose endpoints.
Caching concerns have also been abstracted behind a general purpose
`OperationMethodInvokerAdvisor` interface.

Configuration properties have been refined to further enforce
separation. The `management.endpoint.<name>` prefix provides
configuration for a  single endpoint (including enable and cache
time-to-live). These  properties are now technology agnostic (they
don't include `web` or `jmx` sub properties).

The `management.endpoints.<technology>` prefix provide exposure specific
configuration. For example, `management.endpoints.web.path-mapping`
allow endpoint URLs to be changed.

Endpoint enabled/disabled logic has been simplified so that endpoints
can't be disabled per exposure technology. Instead a filter based
approach is used to allow refinement of what endpoints are exposed over
a given technology.

Fixes gh-10176

Previously, serialization of a @ConfigurationProperties bean to JSON
would fail if:

- A property on the bean returned the bean (the bean was
  self-referential)
- An exception was thrown when attempting to retrieve a property's
  value.

This commit makes the serialization more defensive by skipping any
property that is affected by either of the problems described above.
Debug logging has been added to aid diagnosis of missing properties.

Closes gh-10846

Closes gh-11035

See gh-11030

Closes gh-8831

Closes gh-11026

Closes gh-11012

Closes gh-10548

* pr/10812:
  Polish "Add support for reactive Spring Data Couchbase"
  Add support for reactive Spring Data Couchbase

Closes gh-10812

See gh-10812

* pr/10548:
  Polish "Samples cleanup"
  Samples cleanup

Closes gh-10548

- Modifying dependencies to starter-web with tomcat exclusion plus
  alternative servlet container instead of manual dependency on
  spring-webmvc as it is the preferrable way to use alternative servlet
  container
- Previously RestTemplate with ssl was configured manually in tests - now
  it rellies on autoconfiguration - changed this for multi-connector test
  and added test to ensure that ssl autoconfiguration is working
- Most samples with alterntative servlet containers used some kind of
  service reading property and returning default since it wasn't
  configured - removed it, since it is not specific to using alternative
  servlet containers.

See gh-10548

Closes gh-10648

This commit further aligns the change to ConditionEvaluationReport by
renaming the 'autoconfig' endpoint to 'conditions'.

Closes gh-2945

* pr/11016:
  Upgrade to Kotlin 1.1.60

Closes gh-11016

Closes gh-10890

This commit removes two properties that were remove in earlier
milestones of Spring Boot 2 and reintroduced with the support of
micrometer.

Closes gh-11015

This reverts commit d0171623.

See gh-10993

Closes gh-11004

Closes gh-11003

Closes gh-11002

Closes gh-11001

Closes gh-11000

Closes gh-10999

Closes gh-10998

Closes gh-10997

Closes gh-10996

Closes gh-10995

Closes gh-10994

Closes gh-10993