### What this PR does / why we need it?
Delete deepseek3.2-exp nightly test firstly for replacing
deepseek3.2-exp with deepseek3.2 after nightly tests pass.
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c
Signed-off-by: hfadzxy <starmoon_zhang@163.com>