Adapt release process to new account/buckets

[eantonin]

Description

This PR refactors some scripts and files to renew the mechanism to publish the infrastructure template files during a release. In addition it adapts to the new account and buckets used for the release.

This changes the 1-click links, so should be merged only at release time

Changes

• release process - Add some scripts to upload in the buckets used to release the infrastructure files
  

• release process - Add a script to update automatically the template links in the documentation
  

• release process - Parametrize bucket name in the template, this will be substituted by a script
  

• release process - Add a simple common file for error handling
  

• fix (licenses) - Add license in some files where it was missing
  

• fix (typos) - Fix typos in the slurm accounting template
  

• release process - Fix buckets in the documentation
  

• release process - Add a dictionary mapping each region with the new buckets
  

Changelog entry

N/A

How Has This Been Tested?

In various ways:

1. Running multiple time the scripts, to ensure idempotency and to actually generate the documentation files
2. Launched the Slurm accounting template in us-west-2 (using the 1-click in the slurm-accounting.md file) and successfully created all the resource. Also deletion of the stack was as expected
3. Launched pcluster-manager template in eu-west-1 and ca-central-1 (using 1-click in the readme) and ap-northeast-1 (using the 1-click in pcmanager-install.md file) everything created successfully, I successfully created a cluster, also deletion of the stack was as expected

References

N/A

PR Quality Checklist

• [X] I checked that clusters are listed correctly
• [X] I checked that a new cluster can be created (config is produced and dry run passes)
• [X] I checked that login and logout work as expected

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