refactor: deduplicate images before pushing and signing

[thesayyn]

Following changes has been made to speed up pushing and signing of images.

• Push and sign only the first occurrence of an image,
• Use crane copy to duplicate images at remote registry for the same images but different tags,

As a result;

• Drops the number of pushes & sign invocation 856 to 236
• And introduces a 600 new really efficient copy at the remote tag operation.

This should make distroless distribution pipeline significantly faster and more efficient.

[github-actions]

🌳 🔄 Image Check
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[loosebazooka]

shoot @thesayyn can you rebase this, I'll merge it I rebased it