HDDS-14398. Create ObjectOperationHandler interface

[adoroszlai]

What changes were proposed in this pull request?

First step towards splitting ObjectEndpoint:

• Create the abstract parent class for request handlers, similar to BucketOperationHandler.
• Add helper subclasses for:
  • audit logging,
  • delegation to a list of handlers.
• Add actual implementations, only for PUT request for now:
  • object tagging,
  • object ACL (not supported).
• Let ObjectEndpoint itself implement the new interface to handle remaining branches of PUT request (to be moved to separate handlers later).
• Create a context object for keeping mutable state shared between handlers. This allows:
  • looking up OzoneVolume and OzoneBucket only if needed and at most once
  • passing S3GAction for audit logging back to the caller
  • reducing number and variety of parameters in handler methods

This is a bit different from BucketOperationHandler, where each implementation is currently responsible for its own audit logging. I plan to refactor that to reduce duplication.

https://issues.apache.org/jira/browse/HDDS-14398

How was this patch tested?

Existing tests.

https://github.com/adoroszlai/ozone/actions/runs/21434541033