Remove flaky test from list now that delay is added (#25256)

* Remove flaky test from list now that delay is added

* Fix CI

* Fix CI

* Address PR comments

* Address PR comments

* Fix formatting

* Change to delay as per Chaitanya's comments

* Restyle

scripts/tests/chiptest/__init__.py

@@ -84,10 +84,12 @@ def _GetManualTests() -> Set[str]:
 
 
 def _GetFlakyTests() -> Set[str]:
-    """List of flaky tests, ideally this list should become empty."""
-    return {
-        "Test_TC_OO_2_4.yaml"
-    }
+    """List of flaky tests.
+
+    While this list is empty, it remains here in case we need to quickly add a new test
+    that is flaky.
+    """
+    return set()
 
 
 def _GetSlowTests() -> Set[str]:

src/app/tests/suites/certification/Test_TC_OO_2_4.yaml

@@ -238,6 +238,25 @@ tests:
       PICS: OO.S.C00.Rsp
       command: "Off"
 
+    # We get an acknowledgment that the command off above is received, but it takes
+    # a few milliseconds for the off command to actually turn it off. Without this
+    # delay the preceding reboot command might happen before the command is fully
+    # processed resulting in flaky test failure that comes from the readAddribute
+    # verification after the reboot.
+    # TODO once https://github.com/CHIP-Specifications/chip-test-plans/pull/2464 is
+    # merged, change this command to a readAtribute and update PICS code to
+    # OO.S.A0000. PR is blocked from being merged at this time due to freeze for
+    # SVE. Likely after March 17th, 2023 this PR can be merged and associated
+    # changes made here to officially fix the flake discovered by CI.
+    - label: "Wait for send Off command to take affect"
+      PICS: PICS_SDK_CI_ONLY
+      cluster: "DelayCommands"
+      command: "WaitForMs"
+      arguments:
+          values:
+              - name: "ms"
+                value: 10
+
     - label: "Reboot target device"
       PICS: PICS_SDK_CI_ONLY
       cluster: "SystemCommands"