Implement block producer deletion by its identifier

[anastasiia-bilova]

No description provided.

[codecov-io]

Codecov Report

Merging #124 into develop will decrease coverage by 0.03%.
The diff coverage is 89.79%.

@@             Coverage Diff             @@
##           develop     #124      +/-   ##
===========================================
- Coverage    90.59%   90.56%   -0.04%     
===========================================
  Files           48       48              
  Lines         1255     1303      +48     
===========================================
+ Hits          1137     1180      +43     
- Misses         118      123       +5

Impacted Files	Coverage Δ
directory/user/domain/errors.py	100% <100%> (ø)	⬆️
.../block_producer/tests/views/test_block_producer.py	100% <100%> (ø)	⬆️
directory/block_producer/domain/objects.py	78.5% <80%> (+0.15%)	⬆️
directory/block_producer/views/block_producer.py	88.76% <83.33%> (-1.52%)	⬇️

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