feat: add option to alias the profile name

[PascalFrenz]

Description

This PR adds the possibility to alias the profile name to a custom one if the name of the aws account in rackspace is not satisfactory.

It also adds two new options to the script:

• --no-export which causes AWS_PROFILE to remain untouched
• --debug which enables set -x for the duration of the script for easy debugging of executed statements

Verification

Tested locally with the following options:

• aws_login --no-export --debug <aws_account_no>=<profile_alias>
• aws_login --no-export <aws_account_no>=<profile_alias>
• aws_login --no-export <aws_account_no>=
• aws_login --no-export =<profile_alias>
• aws_login --no-export =
• all of the above without --no-export

Checklist

• My code follows the style guidelines of the project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation

[github-actions]

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[HapagLloydTechnicalUser]

🎉 This PR is included in version 1.4.0 🎉

The release is available on GitHub release

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