Workaround `TRUE` and `FALSE` macro definitions on WIN32

One of the [GCP proto files](https://github.com/googleapis/googleapis/blob/master/google/cloud/asset/v1/assets.proto) defines `TRUE` and `FALSE` as enum values ([permalink](a4f2de4564/google/cloud/asset/v1/assets.proto (L782-L786))).  These cause trouble on WIN32, where `TRUE` and `FALSE` are also macro definitions.

For more details, see https://github.com/googleapis/google-cloud-cpp/issues/8145.

PiperOrigin-RevId: 507831036

src/google/protobuf/port_def.inc

@@ -950,6 +950,10 @@ static_assert(PROTOBUF_CPLUSPLUS_MIN(201402L), "Protobuf only supports C++14 and
 #undef STRICT
 #pragma push_macro("timezone")
 #undef timezone
+#pragma push_macro("TRUE")
+#undef TRUE
+#pragma push_macro("FALSE")
+#undef FALSE
 #endif  // _WIN32
 
 #ifdef __APPLE__

src/google/protobuf/port_undef.inc

@@ -163,6 +163,8 @@
 #pragma pop_macro("STRICT")
 #pragma pop_macro("STATUS_PENDING")
 #pragma pop_macro("timezone")
+#pragma pop_macro("TRUE")
+#pragma pop_macro("FALSE")
 #endif
 
 #ifdef __APPLE__