Restructure our file syncing so GitHub only files are tracked separately in Piper.

PiperOrigin-RevId: 438395194

BUILD

diff --git a/BUILD b/BUILD
index 4cabc12..9c6edcb 100644
--- a/BUILD
+++ b/BUILD
@@ -46,10 +46,15 @@
 
 licenses(["notice"])
 
-exports_files([
-    "LICENSE",
-    "build_defs",
-])
+exports_files(["LICENSE"])
+
+exports_files(
+    [
+        "BUILD",
+        "WORKSPACE",
+    ],
+    visibility = ["//cmake:__pkg__"],
+)
 
 config_setting(
     name = "windows",
@@ -619,15 +624,6 @@
 
 exports_files(
     [
-        "upb/json/parser.rl",
-        "BUILD",
-        "WORKSPACE",
-    ],
-    visibility = ["//cmake:__pkg__"],
-)
-
-exports_files(
-    [
         "third_party/lunit/console.lua",
         "third_party/lunit/lunit.lua",
     ],