[ST]Add e2e test for Npugraphex_pass (#6388)

### What this PR does / why we need it?
We found the custom passes of NPUGraphEX have implemented fusion
operator features, which still require E2E test case validation and
guard. This PR implements E2E test cases for the AddRMSNormQuant and
SplitQKVNormRope operator fusions under NPUGraphEX that are already in
the codebase.
### Does this PR introduce _any_ user-facing change?
NO
### How was this patch tested?

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

---------

Signed-off-by: cjian <2318164299@qq.com>

.github/workflows/scripts/config.yaml

@@ -1,4 +1,8 @@
 e2e-singlecard:
+  - name: tests/e2e/singlecard/compile/test_graphex_norm_quant_fusion.py
+    estimated_time: 80
+  - name: tests/e2e/singlecard/compile/test_graphex_qknorm_rope_fusion.py
+    estimated_time: 80
   - name: tests/e2e/singlecard/test_auto_fit_max_mode_len.py
     estimated_time: 25
   - name: tests/e2e/singlecard/test_aclgraph_accuracy.py