[Feature][Build] Upgrade the minimum version to 3.10 (#3926)

### What this PR does / why we need it?

Closes #3728, #3657. 

The main branch is now aligned with the vllm `releases/v0.11.1` branch,
which no longer supports `Python 3.9`. Check it
[here](https://github.com/vllm-project/vllm/blob/releases/v0.11.1/pyproject.toml).

### Does this PR introduce _any_ user-facing change?

The newest version of vllm-ascend don't support Python 3.9. 

### How was this patch tested?

- vLLM version: v0.11.0
- vLLM main:
83f478bb19

Signed-off-by: gcanlin <canlinguosdu@gmail.com>

examples/disaggregated_prefill_v1/mooncake_connector_deployment_guide.md

@@ -3,7 +3,7 @@
 ## Environmental Dependencies
 
  *  Software:
-     *  Python >= 3.9, < 3.12
+     *  Python >= 3.10, < 3.12
      *  CANN >= 8.3.rc1
      *  PyTorch == 2.7.1, torch-npu == 2.7.1
      *  vLLM (same version as vllm-ascend)