zink/ci: use the debian-built-testing for nvk

Fixes: 5b291c7ce6 ("ci: Move r300/nine/nvk builds out of critical path")
Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33401>
(cherry picked from commit a55613ce8d)

.pick_status.json

@@ -104,7 +104,7 @@
         "description": "zink/ci: use the debian-built-testing for nvk",
         "nominated": true,
         "nomination_type": 2,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "5b291c7ce652c27800624808f6bfef513d7ac3de",
         "notes": null

src/gallium/drivers/zink/ci/gitlab-ci-inc.yml

@@ -205,7 +205,7 @@
 
 .zink-nvk-test-valve:
   extends:
-    - .b2c-x86_64-test-gl
+    - .b2c-x86_64-test-gl-manual
     - .nvk-vkcts
     - .zink-test
   variables: