Aws backend

[TL231]

Initial barebones aws backend commit.

• Adds a backend client for aws.
• Adds a local test for aws client.
  Things to be done/fixed.
• Fix workflow test.
• Figure where to add transpiler
• Refactor code

Things to be done/fixed (2024-04-30):

• Remove transpiler from "barebones" version
• Remove verbatim circuits from "barebones" version
• Include aws_client.py in qibo/src/qibo/backends/init.py,
• pytests for aws_client.py

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.13115% with 17 lines in your changes are missing coverage. Please review.

Project coverage is 80.17%. Comparing base (c1e4f62) to head (a9e7dfd).

Files	Patch %	Lines
src/qibo_cloud_backends/aws_client.py	72.13%	17 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
- Coverage   89.09%   80.17%   -8.92%     
==========================================
  Files           3        4       +1     
  Lines          55      116      +61     
==========================================
+ Hits           49       93      +44     
- Misses          6       23      +17     

Flag	Coverage Δ
unittests	80.17% <72.13%> (-8.92%)	⬇️

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