Move test code and metadata to tests-extension directory

Relocates all test-related code into the isolated test module:

Test code moved:
- test/extended/event_ttl.go → test/extended/tests-extension/event_ttl.go
- test/extended/main.go → test/extended/tests-extension/main.go
- cmd/cluster-kube-apiserver-operator-tests-ext → test/extended/tests-extension/cmd/

Metadata moved:
- .openshift-tests-extension/ → test/extended/tests-extension/.openshift-tests-extension/

Import path updates:
- Updated cmd/main.go to import from tests-extension module

This consolidates all test extension components (code, binary entry point,
and test metadata) into a single self-contained directory that uses its
own go.mod for dependency management.

The test binary and metadata now live alongside the test code in
test/extended/tests-extension/, making the test module completely
independent from the operator codebase.

Author: gangwgr

.openshift-tests-extension/openshift_payload_cluster-kube-apiserver-operator.json renamed to test/extended/tests-extension/.openshift-tests-extension/openshift_payload_cluster-kube-apiserver-operator.json

@@ -10,9 +10,9 @@ They use the framework: https://github.com/openshift-eng/openshift-tests-extensi
 | Command                                                                                    | Description                                                              |
 |--------------------------------------------------------------------------------------------|--------------------------------------------------------------------------|
 | `make tests-ext-build`                                                                     | Builds the test extension binary.                                        |
-| `./cluster-kube-apiserver-operator-tests-ext list`                                    | Lists all available test cases.                                          |
-| `./cluster-kube-apiserver-operator-tests-ext run-suite <suite-name>`                  | Runs a test suite. e.g., `openshift/cluster-kube-apiserver-operator/conformance/parallel` |
-| `./cluster-kube-apiserver-operator-tests-ext run <test-name>`                         | Runs one specific test.                                                  |
+| `test/extended/tests-extension/cluster-kube-apiserver-operator-tests-ext list`           | Lists all available test cases.                                          |
+| `test/extended/tests-extension/cluster-kube-apiserver-operator-tests-ext run-suite <suite-name>` | Runs a test suite. e.g., `openshift/cluster-kube-apiserver-operator/conformance/parallel` |
+| `test/extended/tests-extension/cluster-kube-apiserver-operator-tests-ext run <test-name>` | Runs one specific test.                                                  |
 
 
 ## How to Run the Tests Locally
@@ -22,6 +22,7 @@ Use the environment variable `KUBECONFIG` to point to your cluster configuration
 
 ```shell
 export KUBECONFIG=path/to/kubeconfig
+test/extended/tests-extension/cluster-kube-apiserver-operator-tests-ext run <test-name>
 ./cluster-kube-apiserver-operator-tests-ext run <test-name>
 ```
 

test/extended/README.md renamed to test/extended/tests-extension/README.md

@@ -20,7 +20,7 @@ import (
 	"github.com/spf13/cobra"
 
 	// The import below is necessary to ensure that the OAS operator tests are registered with the extension.
-	_ "github.com/openshift/cluster-kube-apiserver-operator/test/extended"
+	_ "github.com/openshift/cluster-kube-apiserver-operator/test/extended/tests-extension"
 )
 
 func main() {