Fix upload assets by chunks

[maximst]

https://youtrack.raccoongang.com/issue/CB-27

[codecov]

Codecov Report

Merging #546 into ginkgo-rg will increase coverage by <.01%.
The diff coverage is 41.66%.

@@              Coverage Diff              @@
##           ginkgo-rg     #546      +/-   ##
=============================================
+ Coverage       94.8%   94.81%   +<.01%     
=============================================
  Files           1862     1862              
  Lines         170570   171606    +1036     
=============================================
+ Hits          161711   162708     +997     
- Misses          8859     8898      +39

Impacted Files	Coverage Δ
cms/djangoapps/contentstore/views/assets.py	86.34% <41.66%> (-9.55%)	⬇️
lms/djangoapps/shoppingcart/tests/test_views.py	100% <0%> (ø)	⬆️
cms/djangoapps/contentstore/signals/handlers.py	95.16% <0%> (+0.16%)	⬆️
lms/djangoapps/shoppingcart/views.py	97.58% <0%> (+0.27%)	⬆️
lms/djangoapps/dashboard/sysadmin.py	65.63% <0%> (+0.96%)	⬆️
cms/djangoapps/contentstore/tests/test_utils.py	97.04% <0%> (+0.96%)	⬆️
cms/djangoapps/contentstore/utils.py	97.13% <0%> (+1.15%)	⬆️
lms/djangoapps/dashboard/tests/test_sysadmin.py	98.65% <0%> (+1.37%)	⬆️

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[cmltaWt0]

Is this PS stale? Should it be closed?

[realARCHaim]

Is this PS stale? Should it be closed?
Don't see nothing significant enough that prevents it from closing.