Don't use Files.copy() when decrypting to stdout

Files.copy() attempts to delete the file if it already exists, which obviously
won't work very well for /dev/stdout.  Instead copy directly from the decoder
to standard output.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=228384575

java/google/registry/tools/BUILD

@@ -65,6 +65,7 @@ java_library(
         "//java/google/registry/whois",
         "//java/google/registry/xjc",
         "//java/google/registry/xml",
+        "//third_party/java/jakarta_commons_io",
         "//third_party/jaxb",
         "//third_party/objectify:objectify-v4_1",
         "@com_beust_jcommander",