feat(runtime): support for owned shared streams

[mateiidavid]

We added support for shared streams in the controller via a reflector. There are only two public interfaces available to thread a stream through a controller, for_shared_stream and for_shared_stream_with.

For non-shared streams, the controller can compose with other types of streams that will trigger reconciliation, e.g. streams of owned objects, or custom streams that take mappers out-of-band. For parity, the controller should expose public interfaces to allow the same for shared streams.

This change adds four new interfaces:

• owns_shared_stream
• owns_shared_stream_with
• watches_shared_stream
• watches_shared_stream_with

The contract is the same as for_shared_stream. Accept a stream of Arc<K> and turn it into a reconciliation trigger.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 23 lines in your changes are missing coverage. Please review.

Project coverage is 74.1%. Comparing base (687506f) to head (52dba2c).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1483     +/-   ##
=======================================
- Coverage   74.4%   74.1%   -0.2%     
=======================================
  Files         78      78             
  Lines       6778    6801     +23     
=======================================
  Hits        5037    5037             
- Misses      1741    1764     +23     

Files	Coverage Δ
kube-runtime/src/controller/mod.rs	29.9% <0.0%> (-2.4%)	⬇️

[clux]

Looks very much like what I expected. It's duplication driven atm, and that's fine for now as it's all behind the flag.