refactor client body

[tottoto]

Refactors the response body.

[codecov]

Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 71.9%. Comparing base (5dce83b) to head (01936ba).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1462     +/-   ##
=======================================
- Coverage   72.1%   71.9%   -0.1%     
=======================================
  Files         78      78             
  Lines       6592    6571     -21     
=======================================
- Hits        4747    4721     -26     
- Misses      1845    1850      +5     

Files	Coverage Δ
kube-client/src/client/body.rs	71.5% <44.5%> (-10.9%)	⬇️

[clux]

very nice. thank you!