fix: Deadlock issue caused in listResources (argoproj/argo-cd#18902)

[jdroot]

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Fixes argoproj/argo-cd#18902

[agaudreault]

Superseded by https://github.com/argoproj/gitops-engine/pull/604. If memory consumption is too unpredictible with the change, let revisit and check if we allow a mechanism to skip the semaphore 👍 Good job on finding the deadlock nontheless, I wish I had saw your issue sooner!