ci: Unify {BARE_METAL,LAVA}_TEST_SCRIPT environment

Should also probably never have been different.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Acked-by: Martin Peres <martin.peres@mupuf.org>
Acked-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11337>

.gitlab-ci/lava/lava-gitlab-ci.yml

@@ -37,7 +37,7 @@
     KERNEL_IMAGE_NAME: zImage
     KERNEL_IMAGE_TYPE: "type:\ zimage"
     BOOT_METHOD: u-boot
-    LAVA_TEST_SCRIPT: "/install/deqp-runner.sh"
+    HWCI_TEST_SCRIPT: "/install/deqp-runner.sh"
   extends:
     - .use-arm_build # for same $MESA_ARTIFACTS_TAG as in kernel+rootfs_armhf
     - .use-x86_build
@@ -54,7 +54,7 @@
     KERNEL_IMAGE_NAME: Image
     KERNEL_IMAGE_TYPE: "type:\ image"
     BOOT_METHOD: u-boot
-    LAVA_TEST_SCRIPT: "/install/deqp-runner.sh"
+    HWCI_TEST_SCRIPT: "/install/deqp-runner.sh"
   extends:
     - .use-arm_build # for same $MESA_ARTIFACTS_TAG as in kernel+rootfs_arm64
     - .use-x86_build
@@ -73,7 +73,7 @@
     KERNEL_IMAGE_NAME: bzImage
     KERNEL_IMAGE_TYPE: "type:\ zimage"
     BOOT_METHOD: u-boot
-    LAVA_TEST_SCRIPT: "/install/deqp-runner.sh"
+    HWCI_TEST_SCRIPT: "/install/deqp-runner.sh"
   extends:
     - .use-x86_build-base # for same $MESA_ARTIFACTS_BASE_TAG as in kernel+rootfs_amd64
     - .use-x86_build
@@ -85,7 +85,7 @@
 
 .lava-traces-base:
   variables:
-    LAVA_TEST_SCRIPT: "/install/piglit/run.sh"
+    HWCI_TEST_SCRIPT: "/install/piglit/run.sh"
   artifacts:
     reports:
       junit: results/junit.xml
@@ -94,7 +94,7 @@
   variables:
     PIGLIT_REPLAY_DEVICE_NAME: "gl-${GPU_VERSION}"
     PIGLIT_RESULTS: "${GPU_VERSION}-${PIGLIT_PROFILES}"
-    LAVA_TEST_SCRIPT: "/install/piglit/piglit-runner.sh"
+    HWCI_TEST_SCRIPT: "/install/piglit/piglit-runner.sh"
 
 .lava-piglit-traces:amd64:
   extends: