backport of commit ad35129 (#29317)

Co-authored-by: Thy Ton <[email protected]>

scripts/copywrite-exceptions.sh

@@ -1,10 +1,11 @@
 #!/bin/sh
 
 # Used as a stopgap for copywrite bot in MPL-licensed subdirs, detects BUSL licensed
-# headers and deletes them, then runs the copywrite bot to utilize local subdir config
+# headers in only files intended for public users, and deletes them,
+# then runs the copywrite bot to utilize local subdir config
 # to inject correct headers.
 
-find . -type f -name '*.go' | while read line; do
+find . -type f -name '*.go' -not -name '*_ent.go' | while read line; do
   if grep "SPDX-License-Identifier: BUSL-1.1" $line; then
     sed -i '/SPDX-License-Identifier: BUSL-1.1/d' $line
     sed -i '/Copyright (c) HashiCorp, Inc./d' $line