Add release_windows.bat and release_windows.cfg to copy.bara.sky

PiperOrigin-RevId: 919783833

Author: dmitriplotnikov

release/kokoro/release_windows.bat

@@ -0,0 +1,5 @@
+@echo off
+echo Cel-expr-python release build on Windows
+echo TODO(b/507567432): implement release build for windows.
+
+exit /b 0

release/kokoro/release_windows.cfg

@@ -0,0 +1,9 @@
+# proto-file: //devtools/kokoro/config/proto/build.proto
+# proto-message: BuildConfig
+
+build_file: "cel-python/release/kokoro/release_windows.bat"
+timeout_mins: 120
+
+container_properties {
+  docker_image: "us-central1-docker.pkg.dev/kokoro-container-bakery/kokoro/windows/windows2019/full@sha256:c9995cdda2206803409164f9682f47e0027b8836076591a960373e3cdb1847e1"
+}