[FEA] TSP Enhancements

[anandhkb]

• Sequential batched TSP POC (S) P0
• Batched TSP (M) P1
• Multi-GPU TSP (L) P1
• RL initialization (S) P0
• RL split procedure (L) P1

[anandhkb]

@afender @hlinsen for viz

[anandhkb]

A lot of progress from @hlinsen in 25.10 on the TSP enhancements, completed. Slating remaining work for 25.12