Fix memory leak and improve upload progress

[romasku]

Closes #2504

[codecov]

Codecov Report

Merging #2523 (8adc079) into master (46f6e79) will decrease coverage by 0.03%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master    #2523      +/-   ##
==========================================
- Coverage   85.47%   85.43%   -0.04%     
==========================================
  Files          70       70              
  Lines       11794    11826      +32     
  Branches     2293     2295       +2     
==========================================
+ Hits        10081    10104      +23     
- Misses       1332     1338       +6     
- Partials      381      384       +3     

Impacted Files	Coverage Δ
neuro-sdk/src/neuro_sdk/_bucket_base.py	86.25% <ø> (ø)
neuro-sdk/src/neuro_sdk/_s3_bucket_provider.py	91.40% <85.71%> (+0.40%)	⬆️
neuro-sdk/src/neuro_sdk/_file_utils.py	89.83% <95.45%> (-0.21%)	⬇️
neuro-sdk/src/neuro_sdk/_buckets.py	85.67% <100.00%> (ø)
neuro-sdk/src/neuro_sdk/_core.py	92.41% <0.00%> (-2.07%)	⬇️
neuro-cli/src/neuro_cli/asyncio_utils.py	77.48% <0.00%> (-0.67%)	⬇️
neuro-cli/src/neuro_cli/main.py	61.53% <0.00%> (-0.65%)	⬇️

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