Develop the Flux conformance test suite for AWS integration

[stefanprodan]

The Flux project has been granted AWS credits for 2024. We should extend our end-to-end test suite to cover all the integrations of Flux with AWS services in a similar fashion with the ones developed for Google Cloud.

The end-to-end test suite should cover:

• Conformance of Flux controllers with AWS EKS including auth to AWS services using IRSA
• Conformance of Flux OCI artifacts operations with AWS ECR
• Conformance of Flux image scanning with AWS ECR
• Conformance of Flux secrets decryption with AWS KMS

The test suite should be employed at all stages of development same as the GCP one.

[m-e-l-u-h-a-n]

Hi, @stefanprodan I was interested in working in this issue under LFX mentorship program. It would be truly helpful if you could please link me to any relevant resources (previous pull requests/docs) that I can go through to familiarize myself with the issue and start my contributions.