ci: allow TfLint cloud access via pre-deployed role

[kayman-mk]

Description

This PR uses the secrets provided by the GitHub organization to access a cloud account to be able to use TfLint. The hardcoded credentials weren't working any longer.

Verification

The workflow ran on this PR. It failed before.

Checklist

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

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