fix: #8870 manifest kustomize paths using env var with absolute path

[ryanohnemus]

Fixes: #8870 manifest kustomize paths using env var with absolute path

Description
The absolute path expansion was happening before any environment template expansion occurred within the path variable. This caused kustomize paths that contain environment template variables using an absolute path to have the workspace path prepended which would then generate an invalid path that would be sent to the kustomize build command.

This change has environment variable expansion within kustomize paths occur before absolute path expansion.

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