refactor: remove BodyDataStream

[tottoto]

Removes BodyDataStream.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.1%. Comparing base (156a6e6) to head (8cf014f).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1455     +/-   ##
=======================================
- Coverage   72.1%   72.1%   -0.0%     
=======================================
  Files         78      78             
  Lines       6601    6591     -10     
=======================================
- Hits        4755    4747      -8     
+ Misses      1846    1844      -2     

Files	Coverage Δ
kube-client/src/client/body.rs	84.9% <100.0%> (+1.2%)	⬆️
kube-client/src/client/mod.rs	74.4% <100.0%> (ø)

[clux]

nice use of upstream types (TryFilter docs and BodyStream)