Switch from arm64 biarch image to Azure Linux image (dotnet#101946)

The biarch image is currently unused in our ci builds.

Use of the biarch image was added in
dotnet#91019 but the job that
used it was disabled for arm64 in
dotnet#92057. dotnet#90427
tracks adding back the arm64 jobs.

The arm64 fullaot job was added in
dotnet#55362 which explains:

> We don't ship any products using FullAOT on Linux x64/arm64, but this
compilation mode is used for iOS, FullAOT-related issues that affect iOS are
likely to be caught by FullAOT on Linux x64/arm64, and it is a lot easier to
build, develop, and debug on desktop OSes.

If the arm64 job is enabled again in the future, it should be
made to use a new entry in `pipeline-with-resources.yml`, instead
of modifying the image used for all other linux_arm64 jobs.

Fixes dotnet#101707

eng/pipelines/common/templates/pipeline-with-resources.yml

@@ -27,9 +27,8 @@ extends:
           ROOTFS_DIR: /crossrootfs/armv6
 
       linux_arm64:
-        image: mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-biarch-amd64-arm64
+        image: mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-cross-arm64-net9.0
         env:
-          ROOTFS_HOST_DIR: /crossrootfs/x64
           ROOTFS_DIR: /crossrootfs/arm64
 
       linux_musl_x64: