Add detect-private-key to pre-commit (#3589)

Author: lucacome

.pre-commit-config.yaml

@@ -29,6 +29,8 @@ repos:
       - id: no-commit-to-branch
       - id: requirements-txt-fixer
       - id: fix-byte-order-marker
+      - id: detect-private-key
+        exclude: ^(examples/|tests/|internal/k8s/secrets/)
   - repo: local
     hooks:
       - id: golang-diff