[CI] Update doctest from 0.9.1 to 0.13.0, and copy doc test workflow to nightly CI for better monitor. (#6452)

### What this PR does / why we need it?
[CI] Update doctest from 0.9.1 to 0.13.0, and copy doc test workflow to
nightly CI for better monitor.
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.14.1
- vLLM main:
dc917cceb8

---------

Signed-off-by: menogrey <1299267905@qq.com>

.github/workflows/labled_doctest.yaml

@@ -30,9 +30,6 @@ on:
       - 'tests/e2e/doctests/**'
       - 'tests/e2e/common.sh'
       - 'tests/e2e/run_doctests.sh'
-  schedule:
-    # Runs every 12 hours
-    - cron:  '0 */12 * * *'
 
 # Bash shells do not use ~/.profile or ~/.bashrc so these shells need to be explicitly
 # declared as "shell: bash -el {0}" on steps that need to be properly activated.
@@ -47,7 +44,7 @@ jobs:
       # Each version should be tested
       fail-fast: false
       matrix:
-        vllm_verison: [v0.9.1-dev, v0.9.1-dev-openeuler, main, main-openeuler]
+        vllm_verison: [releases-v0.13.0, releases-v0.13.0-openeuler, main, main-openeuler]
     name: vLLM Ascend test
     runs-on: linux-aarch64-a2-1
     container: