Add buildkite pipeline for GPU workloads.

PiperOrigin-RevId: 575928869

.buildkite/gpu.yaml

@@ -0,0 +1,25 @@
+agents:
+  queue: release
+_templates:
+  common: &common
+    timeout_in_minutes: 120
+    retry:
+      automatic:
+        - exit_status: -1
+          limit: 10
+        - exit_status: "*"
+          limit: 2
+
+env:
+  # Force a clean checkout every time to avoid reuse of files between runs.
+  BUILDKITE_CLEAN_CHECKOUT: true
+
+steps:
+  # GPU workflow.
+  - <<: *common
+    if: build.branch == "master" && build.tag == null
+    label: ":screwdriver: All GPU Drivers Test"
+    commands:
+      - tools/gpu/all_drivers_test.sh
+    agents:
+      queue: gpu