### What this PR does / why we need it?
Improve Triton stability on Ascend for large grids
set `TRITON_ALL_BLOCKS_PARALLEL=1` when grids > 65535
- vLLM version: v0.14.1
- vLLM main:
dc917cceb8
Signed-off-by: hfadzxy <starmoon_zhang@163.com>
### What this PR does / why we need it?
Improve Triton stability on Ascend for large grids
set `TRITON_ALL_BLOCKS_PARALLEL=1` when grids > 65535
- vLLM version: v0.14.1
- vLLM main:
dc917cceb8
Signed-off-by: hfadzxy <starmoon_zhang@163.com>