[torch.compile] Reorganize vllm/compilation and tests/compile (0/N for vLLM IR) (#33731)

Signed-off-by: Luka Govedič <lgovedic@redhat.com>
Signed-off-by: ProExpertProg <luka.govedic@gmail.com>
Signed-off-by: Luka Govedič <ProExpertProg@users.noreply.github.com>

.buildkite/test_areas/pytorch.yaml

@@ -3,7 +3,7 @@ depends_on:
   - image-build
 steps:
 - label: PyTorch Compilation Unit Tests
-  timeout_in_minutes: 30
+  timeout_in_minutes: 10
   source_file_dependencies:
     - vllm/
     - tests/compile
@@ -17,6 +17,14 @@ steps:
   # (using -0 for proper path handling)
   - "find compile/ -maxdepth 1 -name 'test_*.py' -print0 | xargs -0 -n1 -I{} pytest -s -v '{}'"
 
+- label: PyTorch Compilation Passes Unit Tests
+  timeout_in_minutes: 20
+  source_file_dependencies:
+    - vllm/
+    - tests/compile/passes
+  commands:
+  - pytest -s -v compile/passes --ignore compile/passes/distributed
+
 - label: PyTorch Fullgraph Smoke Test
   timeout_in_minutes: 35
   source_file_dependencies: