Environment variable for S3 bucket location

[ndegory]

The region for the S3 bucket can already be influenced by AWS_REGION or AWS_DEFAULT_REGION. But in some cases these variables may have to be set to another value (for example I'm using helmsman with S3 bucket in us-west-2 for helm-s3, but also SSM parameters in us-east-1).

This MR adds a helm-s3 specific environment variable to force the bucket location.

References #51

Signed-off-by: Nicolas Degory ndegory@axway.com

[codecov-commenter]

Codecov Report

Merging #117 into master will increase coverage by 0.51%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #117      +/-   ##
==========================================
+ Coverage   39.26%   39.77%   +0.51%     
==========================================
  Files          18       18              
  Lines         354      357       +3     
==========================================
+ Hits          139      142       +3     
  Misses        204      204              
  Partials       11       11              

Impacted Files	Coverage Δ
internal/awsutil/session.go	76.19% <100.00%> (+3.96%)	⬆️

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[maushah]

Do we have an ETA on the release for this plugin with the helm_s3_region env?

[hypnoglow]

LGTM, thank you for the contribution.