docs: clarify SR-IOV Pod VF selection

[changluyi]

Summary

• Add SR-IOV ACP 4.3 solution docs in zh/en from the existing SR-IOV documentation branch.
• Clarify that Pods cannot directly specify a VF PCI address or VF index in the Pod spec.
• Document using SriovNetworkNodePolicy pfNames with VF indexes/ranges, such as add pipeline #3, to expose a dedicated resource pool for Pod selection.
• Explain why hard-coding CNI deviceID in NAD or Pod is not recommended.

Verification

• git diff --check