fix: Always use forward slash in originAnnotations

[cblims]

This change fixes originAnnotations where Kustomize on Windows generate paths with backslashes (), which conflicts when the same configuration is applied on Linux/macOS (using /).

• Replaced filepath.Join with path.Join to ensure that paths always use slash as a separator, regardless of the operating system.
• Renamed the local variable path to inputPath to avoid conflicts with the path package, improving readability and maintainability.

[linux-foundation-easycla]

• ✅login: cblims / (f0ea905)

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