chore: Telling owlbot to ignore these files & it's a monorepo (#1372)

* chore: Telling owlbot to ignore these files & it's a monorepo
diff --git a/java-iam/owlbot.py b/java-iam/owlbot.py
index a53d819..dc41093 100644
--- a/java-iam/owlbot.py
+++ b/java-iam/owlbot.py
@@ -22,8 +22,17 @@
   s.move(library)
 
 s.remove_staging_dirs()
-java.common_templates(excludes=[
-  'README.md',
-  'samples/*',
-  '.github/workflows/samples.yaml',
+java.common_templates(monorepo=True,excludes=[
+  ".github/*",
+  ".kokoro/*",
+  "CODE_OF_CONDUCT.md",
+  "CONTRIBUTING.md",
+  "LICENSE",
+  "SECURITY.md",
+  "java.header",
+  "license-checks.xml",
+  "README.md",
+  "samples/*",
+  "renovate.json",
+  ".gitignore"
 ])