drm/doc: ci: Require more context for flaky tests

Flaky tests can be very difficult to reproduce after the facts, which
will make it even harder to ever fix.

Let's document the metadata we agreed on to provide more context to
anyone trying to address these fixes.

Link: https://lore.kernel.org/dri-devel/CAPj87rPbJ1V1-R7WMTHkDat2A4nwSd61Df9mdGH2PR=ZzxaU=Q@mail.gmail.com/Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231025142441.745947-1-mripard@kernel.org

Documentation/gpu/automated_testing.rst

@@ -67,6 +67,19 @@ Lists the tests that for a given driver on a specific hardware revision are
 known to behave unreliably. These tests won't cause a job to fail regardless of
 the result. They will still be run.
 
+Each new flake entry must be associated with a link to the email reporting the
+bug to the author of the affected driver, the board name or Device Tree name of
+the board, the first kernel version affected, and an approximation of the
+failure rate.
+
+They should be provided under the following format::
+
+  # Bug Report: $LORE_OR_PATCHWORK_URL
+  # Board Name: broken-board.dtb
+  # Version: 6.6-rc1
+  # Failure Rate: 100
+  flaky-test
+
 drivers/gpu/drm/ci/${DRIVER_NAME}-${HW_REVISION}-skips.txt
 -----------------------------------------------------------