Move restore from backend to tools

Move the "restoreCommitLogs" command from the backend module to the tools
module so it's easier to access with nomulus.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=156768389

java/google/registry/module/tools/BUILD

@@ -8,6 +8,7 @@ java_library(
     name = "tools",
     srcs = glob(["*.java"]),
     deps = [
+        "//java/google/registry/backup",
         "//java/google/registry/config",
         "//java/google/registry/dns",
         "//java/google/registry/export",