ci/radv: Rebalance stoney-vkcts

- Increase the fraction for radv-stoney-vkcts from 15 to 18.
- Same for radv-angle, from 2 to 3

The last one should take around 7 minutes, but this new 3 minute gap can
be filled in by the ~95% DUT availability and eventual infra retries.

Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31699>

src/amd/ci/gitlab-ci.yml

@@ -8,7 +8,7 @@ radv-stoney-vkcts:x86_64:
     - .radv-stoney-test:x86_64
   parallel: 5
   variables:
-    DEQP_FRACTION: 15
+    DEQP_FRACTION: 18
 
 radv-stoney-angle:
   extends:
@@ -19,7 +19,7 @@ radv-stoney-angle:
     USE_ANGLE: 1
     HWCI_START_XORG: 1
     GPU_VERSION: angle-radv-stoney-aco
-    DEQP_FRACTION: 2
+    DEQP_FRACTION: 3
 
 radv-stoney-angle-full:
   extends: