Revisit public API for `MBeanExporter`

[sbrannen]

Overview

Inspired by #30846, we should revisit the public API for MBeanExporter, potentially deprecating the AUTODETECT_ constants, etc.

If we deprecate those constants and the corresponding setter methods, we should close #17728.

Related Issues

• Introduce AutodetectMode enum for MBeanExporter [SPR-13137] #17728
• Avoid need for reflection hints for MBeanExporter in native image #30846

[jhoeller]

With AnnotationMBeanExporter in the picture, we can definitely deprecate the autowire constants. From an initial pass, nothing else jumps out as equally outdated, so from a backwards compatibility perspective it's probably better to preserve the remaining configuration options as-is.