[ci] Mark tensorizer as soft fail and separate from grouped test (#6810)

[ci] Mark tensorizer test as soft fail and separate it from grouped test in fast check (#6810)
Signed-off-by: kevin <kevin@anyscale.com>

.buildkite/test-pipeline.yaml

@@ -17,11 +17,10 @@ steps:
   - pytest -v -s test_utils.py # Utils
   - pytest -v -s worker # Worker
 
-- label: Tensorizer, Metrics, Tracing Test
+- label: Metrics, Tracing Test
   fast_check: true
   fast_check_only: true
   commands:
-  - apt-get install -y curl libsodium23 && pytest -v -s tensorizer_loader # Tensorizer
   - pytest -v -s metrics # Metrics
   - "pip install \
       opentelemetry-sdk \
@@ -221,6 +220,8 @@ steps:
 
 - label: Tensorizer Test
   #mirror_hardwares: [amd]
+  soft_fail: true
+  fast_check: true
   commands:
     - apt-get install -y curl libsodium23
     - export VLLM_WORKER_MULTIPROC_METHOD=spawn