Retry "flux push artifact" operations

[xaka]

Describe the bug

While running multiple "flux push" commands in parallel against the same AWS ECR registry, but different repos, it ends up crashing with "TOOMANYREQUESTS: Rate exceeded". The expectation is flux would re-try instead and keep going until it succeeds.

Steps to reproduce

N/A

Expected behavior

Flux continues to re-try until operation succeeds instead of crashing

Screenshots and recordings

No response

OS / Distro

N/A

Flux version

v0.40.2

Flux check

N/A

Git provider

No response

Container Registry provider

AWS ECR

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[stefanprodan]

We could add retries with back-off until the specified --timeout expires.