Python API: Return actual rebuilt size when rebuilding chunks

[AymericDu]

SUMMARY

Return actual rebuilt size when rebuilding chunk

The rebuilt size was good for the duplicated chunk.
But the rebuilt size was wrong for chunk in EC.
The rebuilt size was the metachunk size, but it must be the chunk size.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

• Python API
• Admin CLI
• oio-blob-rebuilder

SDS VERSION

openio 5.8.1.dev1

[codecov-io]

Codecov Report

Merging #2114 (3e30798) into 5.x (23625df) will increase coverage by 0.03%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##              5.x    #2114      +/-   ##
==========================================
+ Coverage   79.31%   79.33%   +0.03%     
==========================================
  Files         394      394              
  Lines       75524    75522       -2     
  Branches     7013     7012       -1     
==========================================
+ Hits        59894    59909      +15     
+ Misses      15385    15368      -17     
  Partials      245      245              

Impacted Files	Coverage Δ
oio/content/ec.py	56.46% <50.00%> (-0.92%)	⬇️
oio/blob/operator.py	65.00% <100.00%> (+1.37%)	⬆️
oio/content/plain.py	73.69% <100.00%> (+0.47%)	⬆️
meta0v2/meta0_remote.c	78.05% <0.00%> (-7.31%)	⬇️
tests/unit/api/test_container_client.py	92.86% <0.00%> (-7.14%)	⬇️
oio/common/storage_functions.py	85.63% <0.00%> (-4.57%)	⬇️
meta1v2/meta1_prefixes.c	76.81% <0.00%> (-3.09%)	⬇️
meta2v2/meta2_filters_action_container.c	60.28% <0.00%> (-2.05%)	⬇️
...sts/functional/content/test_content_perfectible.py	82.36% <0.00%> (-1.96%)	⬇️
oio/account/client.py	81.49% <0.00%> (-1.85%)	⬇️
... and 42 more

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