xDS interop: update td bootstrap from v0.12.0-rc1 to v0.14.0 (#30455)

Corresponding changes to the k8s manifests:
- Remove `include-v3-features-experimental`: it's enabled by default as of v0.11.0
- Remove `include-psm-security-experimental`: enabled by default as of v0.12.0
- Rename `node-metadata-experimental` to node-metadata: stabilized as of v0.13.0

https://github.com/GoogleCloudPlatform/traffic-director-grpc-bootstrap/releases/tag/v0.12.0-rc1
https://github.com/GoogleCloudPlatform/traffic-director-grpc-bootstrap/releases/tag/v0.14.0

tools/run_tests/xds_k8s_test_driver/config/common.cfg

@@ -1,5 +1,7 @@
 --resource_prefix=xds-k8s-security
---td_bootstrap_image=gcr.io/grpc-testing/td-grpc-bootstrap:2558ec79df06984ed0d37e9e69f34688ffe301bb
+# https://github.com/GoogleCloudPlatform/traffic-director-grpc-bootstrap/releases/tag/v0.14.0
+--td_bootstrap_image=gcr.io/grpc-testing/td-grpc-bootstrap:d6baaf7b0e0c63054ac4d9bedc09021ff261d599
+
 --logger_levels=__main__:DEBUG,framework:INFO
 --verbosity=0
 # Google projects: remove if console.cloud.google.com redirects to Logs Explorer

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/client-secure.deployment.yaml

@@ -66,8 +66,6 @@ spec:
             % if config_mesh:
             - "--config-mesh-experimental=${config_mesh}"
             % endif
-            - "--include-v3-features-experimental"
-            - "--include-psm-security-experimental"
           resources:
             limits:
               cpu: 100m

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/server-secure.deployment.yaml

@@ -66,9 +66,7 @@ spec:
             % if xds_server_uri:
             - "--xds-server-uri=${xds_server_uri}"
             % endif
-            - "--include-v3-features-experimental"
-            - "--include-psm-security-experimental"
-            - "--node-metadata-experimental=app=${namespace_name}-${deployment_name}"
+            - "--node-metadata=app=${namespace_name}-${deployment_name}"
           resources:
             limits:
               cpu: 100m

tools/run_tests/xds_k8s_test_driver/kubernetes-manifests/server.deployment.yaml

@@ -56,8 +56,7 @@ spec:
             % if xds_server_uri:
             - "--xds-server-uri=${xds_server_uri}"
             % endif
-            - "--include-v3-features-experimental"
-            - "--node-metadata-experimental=app=${namespace_name}-${deployment_name}"
+            - "--node-metadata=app=${namespace_name}-${deployment_name}"
           resources:
             limits:
               cpu: 100m