fix: Watch() raises exceptions for received errors

[tomplus]

Fixes #150
Fixes #134

[codecov]

Codecov Report

Merging #151 (fe0e843) into master (8f02233) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #151   +/-   ##
=======================================
  Coverage   31.17%   31.18%           
=======================================
  Files         817      817           
  Lines       93206    93206           
=======================================
+ Hits        29055    29064    +9     
+ Misses      64151    64142    -9     

Impacted Files	Coverage Δ
kubernetes_asyncio/watch/watch.py	95.04% <100.00%> (+0.10%)	⬆️
kubernetes_asyncio/watch/watch_test.py	98.50% <100.00%> (-0.03%)	⬇️
kubernetes_asyncio/client/exceptions.py	43.13% <0.00%> (+17.64%)	⬆️

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