wrc104 Handle S3 403

[mixmixmix]

Adds handling of Access Denied errors from s3 backend and passes them back in a response.

Needed by https://github.com/fjelltopp/who-romania-ckan/issues/104

Testing

Tested with who-romania-ckan deployment, it is build as image v0.5.3c

Checklist

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• The Jira ticket for this issue has been updated to "Ready to Review" or equivalent.
• I have developed these changes in discussion with the appropriate project manager.
• My code follows the general Fjelltopp documentation (see Confluence).
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[ChasNelson1990]

@mixmixmix - are we dropping py3.7 support? What have they done upstream with that?

[mixmixmix]

They moved to 3.12.... The docker image in this repo uses 3.7, but our image in fjelltopp-base-images uses 3.8.

[mixmixmix]

they changed the way how project is built among other things, but there are not changes in documentation - so it is unfinished & out of data in the upstream repo.

[ChasNelson1990]

They moved to 3.12.... The docker image in this repo uses 3.7, but our image in fjelltopp-base-images uses 3.8.

Let's update the image in this repo to 3.8 and remove the 3.7 tests then? I think that should really be part of this PR so it doesn't just hang forever

[mixmixmix]

Why part of this PR? It was broken before and not sure there is any point in trying to tidy it up now.

[mixmixmix]

done!