Migrate non-Linux C++ tests to GHA actions

PiperOrigin-RevId: 506683178

ci/Windows.bazelrc

diff --git a/ci/Windows.bazelrc b/ci/Windows.bazelrc
new file mode 100644
index 0000000..427e923
--- /dev/null
+++ b/ci/Windows.bazelrc
@@ -0,0 +1,2 @@
+import common.bazelrc
+