Add signed upload to azure and s3

[Polandia94]

Add signed upload to azure and s3

Description

Add upload methods on get_object_cdn on azure blob storage and s3, using the same parameters.

Related:
#1458

Status

• done, ready for review

Checklist (tick everything that applies)

• Code linting (required, can be done after the PR checks)
• Documentation
• Tests
• ICLA (required for bigger changes)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 94.11765% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.35%. Comparing base (ae6e522) to head (72262a8).
⚠️ Report is 40 commits behind head on trunk.

Files with missing lines	Patch %	Lines
libcloud/storage/drivers/azure_blobs.py	66.67%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk    #2058   +/-   ##
=======================================
  Coverage   83.34%   83.35%           
=======================================
  Files         353      353           
  Lines       81769    81797   +28     
  Branches     8993     8998    +5     
=======================================
+ Hits        68148    68174   +26     
- Misses      10796    10797    +1     
- Partials     2825     2826    +1     

Files with missing lines	Coverage Δ
libcloud/storage/drivers/ovh.py	80.00% <100.00%> (ø)
libcloud/storage/drivers/s3.py	89.63% <100.00%> (ø)
libcloud/storage/drivers/scaleway.py	80.77% <100.00%> (ø)
libcloud/test/storage/test_aurora.py	100.00% <100.00%> (ø)
libcloud/test/storage/test_azure_blobs.py	94.55% <100.00%> (+0.06%)	⬆️
libcloud/test/storage/test_s3.py	94.04% <100.00%> (+0.11%)	⬆️
libcloud/storage/drivers/azure_blobs.py	86.78% <66.67%> (-0.34%)	⬇️

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[micafer]

Thanks for your contribution, and sorry for de delay in the review.
I have some comments:

In s3.py and azure_blobs.py: ex_method is Literal["GET", "PUT", "DELETE"]
but in In ovh.py and scaleway.py: ex_method is str
This should be consistent across all drivers. I recommend using Literal.

In azure_blobs.py, the docstring does not document the new ex_method parameter.
In s3.py, the docstring does not document the new parameter.
In ovh.py and scaleway.py, the docstring has not been updated.