[SYCL][E2E] Add gpu-intel-pvc-vg LIT param (#12981)

I chose `gpu-intel-pvc-vg` instead of `gpu-intel-pvcvg` to match the
device_arch
[here](https://github.com/intel/llvm/blob/a0cdd9f741c70e7586d7638b88e7b750eb2d540c/sycl/doc/UsersManual.md?plain=1#L51).

---------

Signed-off-by: Sarnie, Nick <nick.sarnie@intel.com>

sycl/test-e2e/README.md

@@ -258,6 +258,9 @@ configure specific single test execution in the command line:
  * **gpu-intel-pvc** - tells LIT infra that Intel GPU PVC is present in the
    system. It is developer / CI infra responsibility to make sure that the
    device is available in the system.
+ * **gpu-intel-pvc-vg** - tells LIT infra that Intel GPU PVC-VG is present in the
+   system. It is developer / CI infra responsibility to make sure that the
+   device is available in the system.
  * **extra_environment** - comma-separated list of variables with values to be
    added to test environment. Can be also set by LIT_EXTRA_ENVIRONMENT variable
    in cmake.

sycl/test-e2e/lit.cfg.py

@@ -157,7 +157,14 @@
     config.available_features.add(
         "matrix-tf32"
     )  # PVC implies the support of TF32 matrix
-
+if lit_config.params.get("gpu-intel-pvc-vg", False):
+    config.available_features.add("gpu-intel-pvc-vg")
+    config.available_features.add(
+        "matrix-fp16"
+    )  # PVC-VG implies the support of FP16 matrix
+    config.available_features.add(
+        "matrix-tf32"
+    )  # PVC-VG implies the support of TF32 matrix    
 if lit_config.params.get("matrix", False):
     config.available_features.add("matrix")