[CI][Misc] Some improvement for github action (#6587)

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

- This PR removes several self-hosted runner labels from the
`actionlint.yaml` configuration file. These runners are likely no longer
in use, so this change cleans up the configuration and ensures
`actionlint` has an accurate list of available runners.
- Move all Action dockerfiles to one folder
- remove useless `runner` input for e2e test.
- update workflow option version

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

No.

### How was this patch tested?

This is a configuration change for the CI linter. The correctness will
be verified by `actionlint` running in CI on subsequent pull requests.

- vLLM version: v0.15.0
- vLLM main:
d7e17aaacd

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

.github/actionlint.yaml

@@ -1,23 +1,14 @@
 self-hosted-runner:
   # Labels of self-hosted runner in array of strings.
   labels:
-    - linux-aarch64-a2-0
-    - linux-aarch64-a2-1
-    - linux-aarch64-a2-2
-    - linux-aarch64-a2-4
-    - linux-aarch64-a2-8
     - linux-arm64-npu-static-8
     - linux-aarch64-310p-1
     - linux-aarch64-310p-2
     - linux-aarch64-310p-4
-    - ubuntu-24.04-arm
     - linux-aarch64-a3-1
     - linux-aarch64-a3-2
     - linux-aarch64-a3-4
     - linux-aarch64-a3-8
-    - linux-amd64-cpu-0
-    - linux-amd64-cpu-8
-    - linux-amd64-cpu-16
     - linux-aarch64-a3-0
     - linux-amd64-cpu-8-hk
     - linux-amd64-cpu-16-hk