chore: exclude codeowners template (#1600)

Author: parthea

owlbot.py

@@ -30,7 +30,7 @@
 s.move(templated_files / '.trampolinerc')  # config file for trampoline_v2
 
 # Also move issue templates
-s.move(templated_files / '.github')
+s.move(templated_files / '.github', excludes=['CODEOWNERS'])
 
 # Move scripts folder needed for samples CI
 s.move(templated_files / 'scripts')