ci: add .NET 10 NativeAOT AotAnywhere builder [CI]

packaging/container/Agent.NativeBuild.Containerfile

@@ -1,5 +1,7 @@
 # Run all build commands on the native amd64 runner. AotAnywhere cross-links
 # the NativeAOT output, so an ARM64 build never needs QEMU.
+ARG NATIVEAOT_BUILDER_IMAGE=localhost/moshiro-dotnet10-nativeaot-aotanywhere:ci
+
 FROM --platform=linux/arm64 alpine:3.24 AS arm64-apk-keys
 
 FROM --platform=linux/amd64 alpine:3.24 AS runtime-libs
@@ -19,7 +21,7 @@ RUN set -eu; \
     for package do tar -xzf "$package" -C /tmp/runtime-root; done; \
     cp -a /tmp/runtime-root/usr/lib/*.so* /out/runtime/
 
-FROM --platform=linux/amd64 mcr.microsoft.com/dotnet/sdk:10.0-noble-aot AS build
+FROM --platform=linux/amd64 ${NATIVEAOT_BUILDER_IMAGE} AS build
 
 WORKDIR /src/backend
 COPY restore/backend/ ./