Release v27 fails to pull from private ECR registries

[yulianedyalkova]

It seems that there is an issue on our release v27 with pulling images from private ECR registries as the ecr-credential-provider binary is not being provided as part of the image anymore, more details in slack thread. This is currently blocking customers to upgrade to v27 and above.

Acceptance criteria:

• Include ecr-credential-provider binary as part of our images
• Draft releases for CAPA for all versions >v26.
• Can we implement a regression test to ensure we won't hit a similar issue again?

[AverageMarcus]

Binary included in images following the release of this PR: https://github.com/giantswarm/capi-image-builder/pull/452 (v1.20.0)

[paurosello]

We can create a private registry in the same account and region we create the E2E clusters, upload a test image and then add a test where a Deployment is created pulling from the private registry.