Azure: Add sandbox64 to CI

Now that sandbox64 can run and pass the regular test.py suite, add it
here as well.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

.azure-pipelines.yml

@@ -301,6 +301,11 @@ stages:
           TEST_PY_BD: "sandbox"
           OVERRIDE: "-O clang-16 -a ASAN"
           TEST_PY_TEST_SPEC: "version"
+        sandbox64:
+          TEST_PY_BD: "sandbox64"
+        sandbox64_clang:
+          TEST_PY_BD: "sandbox64"
+          OVERRIDE: "-O clang-16"
         sandbox_nolto:
           TEST_PY_BD: "sandbox"
           BUILD_ENV: "NO_LTO=1"