Validation: S3 Bucket must exist in the same region as the environment

[anuragpatro]

Signed-off-by: Anurag Patro [email protected]

Changes to existing code to accommodate validating S3 bucket existing in the same region as the environment.
Thanks

[codecov-commenter]

Codecov Report

Merging #36 (03d0381) into dev (f5c3c33) will decrease coverage by 0.44%.
The diff coverage is 64.28%.

@@            Coverage Diff             @@
##              dev      #36      +/-   ##
==========================================
- Coverage   70.37%   69.93%   -0.45%     
==========================================
  Files          27       27              
  Lines        1249     1254       +5     
==========================================
- Hits          879      877       -2     
- Misses        370      377       +7     

Flag	Coverage Δ
unittests	69.93% <64.28%> (-0.45%)	⬇️

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Impacted Files	Coverage Δ
...pctl/validation/infra/validate_aws_s3_locations.py	80.00% <61.53%> (-15.13%)	⬇️
cdpctl/validation/infra/issues.py	100.00% <100.00%> (ø)

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