Migrate examples to tests_e2e directory structure

- Relocated all files and scripts from `examples` to `tests_e2e` for better organization.
- Updated references and paths in configurations, scripts, and test files.
- Adjusted `bump-version.sh` to handle the new `tests_e2e` structure.
- Updated `.gitignore` to reflect path changes.

tests_e2e/kubernetes/.gitignore

@@ -0,0 +1,9 @@
+# kind installation directory
+.kind/
+
+# kubectl config
+kubeconfig
+
+# Test artifacts
+*.log
+service_tls_generated.yml