ci: move aarch64 tag to .use-debian/arm64_build

Like we do in the other `.use-debian/arm64_*`.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34264>

.gitlab-ci/build/gitlab-ci.yml

@@ -466,8 +466,6 @@ debian-android:
     VULKAN_DRIVERS: "asahi,broadcom,freedreno"
     GALLIUM_DRIVERS: "etnaviv,freedreno,lima,nouveau,panfrost,llvmpipe,softpipe,tegra,v3d,vc4,zink"
     BUILDTYPE: "debugoptimized"
-  tags:
-    - aarch64
 
 debian-arm32:
   extends:

.gitlab-ci/container/gitlab-ci.yml

@@ -239,6 +239,8 @@ debian/arm64_build:
 .use-debian/arm64_build:
   extends:
     - .set-image
+  tags:
+    - aarch64
   variables:
     MESA_IMAGE_PATH: "debian/arm64_build"
     MESA_IMAGE_TAG: *debian-arm64_build
@@ -580,8 +582,6 @@ kernel+rootfs_arm64:
     - .kernel+rootfs
     - .firmware_arm64
     - .container-builds-arm64
-  tags:
-    - aarch64
   variables:
     DEBIAN_ARCH: "arm64"
     LLVM_VERSION: *debian-arm64-llvm