fix(artifacts): use multipart uploads on S3 when necessary in core

[moredatarequired]

Description

• Fixes WB-NNNNN
• Fixes #NNNN

What does the PR do? Include a concise description of the PR contents.

• I updated CHANGELOG.md, or it's not applicable

Testing

How was this PR tested?

[codecov]

Codecov Report

Attention: Patch coverage is 49.75610% with 103 lines in your changes missing coverage. Please review.

Project coverage is 75.70%. Comparing base (4ad9166) to head (7baea4a).
Report is 62 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7659      +/-   ##
==========================================
+ Coverage   74.30%   75.70%   +1.40%     
==========================================
  Files         500      500              
  Lines       55647    54163    -1484     
==========================================
- Hits        41347    41006     -341     
+ Misses      13892    12741    -1151     
- Partials      408      416       +8     

Flag	Coverage Δ
func	41.48% <ø> (+0.06%)	⬆️
system	63.36% <47.31%> (-0.14%)	⬇️
unit	56.28% <7.31%> (+0.89%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ore/internal/filetransfer/file_transfer_manager.go	85.13% <100.00%> (+18.81%)	⬆️
core/internal/filetransfer/tasks.go	50.00% <ø> (ø)
core/pkg/server/sender.go	71.41% <100.00%> (+8.97%)	⬆️
...ore/internal/filetransfer/file_transfer_default.go	66.35% <87.50%> (+17.53%)	⬆️
core/pkg/utils/hash.go	64.70% <0.00%> (+3.59%)	⬆️
core/pkg/artifacts/saver.go	60.80% <46.40%> (-4.35%)	⬇️

... and 100 files with indirect coverage changes