gitlab-ci: Drop "test-" prefix from llvmpipe/softpipe job names

Redundant.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3995>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 63d3539..6ac8235 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -629,7 +629,7 @@
   variables:
     DEQP_VER: vk
 
-test-llvmpipe-gles2:
+llvmpipe-gles2:
   variables:
     DEQP_VER: gles2
     DEQP_PARALLEL: 4
@@ -641,24 +641,24 @@
     LIBGL_ALWAYS_SOFTWARE: "true"
   extends: .deqp-test-gl
 
-test-softpipe-gles2:
-  extends: test-llvmpipe-gles2
+softpipe-gles2:
+  extends: llvmpipe-gles2
   variables:
     DEQP_EXPECTED_FAILS: deqp-softpipe-fails.txt
     DEQP_SKIPS: deqp-softpipe-skips.txt
     GALLIUM_DRIVER: "softpipe"
 
-test-softpipe-gles3:
+softpipe-gles3:
   parallel: 2
   variables:
     DEQP_VER: gles3
-  extends: test-softpipe-gles2
+  extends: softpipe-gles2
 
-test-softpipe-gles31:
+softpipe-gles31:
   parallel: 4
   variables:
     DEQP_VER: gles31
-  extends: test-softpipe-gles2
+  extends: softpipe-gles2
 
 arm64_a630_gles2:
   extends: