zink/ci: Work around recent OOM issues in zink-anv-tgl

Lower the concurrency for the zink-anv-tgl job to avoid the out-of-memory
issues seen recently.
Remove the flakes that were added as the previous workaround.

Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34505>

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

@@ -101,6 +101,7 @@ zink-anv-tgl:
     # MESA: error: ZINK: vkQueueSubmit failed (VK_ERROR_DEVICE_LOST)
     # Xorg: ../src/gallium/drivers/zink/zink_batch.c:599: zink_end_batch: Assertion `!ctx->batch_states' failed.
     PIGLIT_PLATFORM: gbm
+    FDO_CI_CONCURRENT: 6 # higher is too much, and leads to OOM
   parallel: 4
 
 # Manual full run when you want to double-check the full status.

src/gallium/drivers/zink/ci/zink-anv-tgl-flakes.txt

@@ -147,19 +147,3 @@ dEQP-EGL.functional.sharing.gles2.multithread.random.programs.link.7
 
 # Fails in the pre-merge job and passes in the nightly
 KHR-GL46.shader_viewport_layer_array.ShaderViewportIndexTestCase
-
-glx@extension string sanity
-glx@glx-close-display
-glx@glx-copy-context-dest-current
-glx@glx-dont-care-mask
-glx@glx-fbconfig-bad
-glx@glx-multi-context-ib-1
-glx@glx-multithread-shader-compile
-glx@glx-query-drawable-glx_width
-glx@glx-swap-exchange
-glx@glx-swap-singlebuffer
-glx@glx_arb_create_context@invalid render type
-glx@glx_arb_create_context@null attribute list
-glx@glx_arb_create_context_profile@pre-gl3.2 profile
-glx@glx_ext_import_context@get current display
-glx@glx_ext_import_context@imported context has same context id