Add functional-gpu tests to mergify config

This adds the functional gpu tests as gating criteria to merge PRs, as
those test SDG's API surface area directly and should always be passing.

Signed-off-by: Ben Browning <[email protected]>

.github/mergify.yml

@@ -59,6 +59,22 @@ pull_request_rules:
         - -files~=^requirements.*\.txt$
         - -files=.github/workflows/e2e-nvidia-t4-x1.yml
 
+    # functional gpu small workflow
+    - or:
+      - and:
+        # note this should match the triggering criteria in 'functional-gpu-nvidia-t4-x1.yml'
+        - check-success~=functional-gpu-small-workflow-complete
+        - or:
+          - files~=\.py$
+          - files=pyproject.toml
+          - files=^requirements.*\.txt$
+          - files=.github/workflows/functional-gpu-nvidia-t4-x1.yml
+      - and:
+        - -files~=\.py$
+        - -files=pyproject.toml
+        - -files~=^requirements.*\.txt$
+        - -files=.github/workflows/functional-gpu-nvidia-t4-x1.yml
+
     # lint must pass if files change that would trigger this job
     - or:
       - and: