[MoE]Support 3D router output shape.

[intelgaoxiong]

Details:

This PR extends to support 3D Router shape.

• Originally, we expect router shape in 4D [num_experts, 1, token_count, 1] or [num_experts, token_count, 1, 1].
• Gemma4 MoE and Qwen3 GQ MoE have 3D Router shape [num_experts, token_count, 1].

Tickets:

• EISW-221552

AI Assistance:

• AI assistance used: no / yes
• If yes, summarize how AI was used and what human validation was performed (build/tests/manual checks).