Record only first resolved credentials for each Docker registry

Tomasz Maczukinrequested to merge
26778-docker-credentials-resolving-regression-fix into master

What does this MR do?

Fixes the regression in resolving Docker registry credentials

Why was this MR needed?

Please read #26778 (closed) for context

What's the best way to test this MR?

What are the relevant issue numbers?

Closes #26778 (closed)

Edited by Tomasz Maczukin

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