chore: update NodeJS post-processor to use MOSS approved images and update node version for tests (#2024)

* chore: update post-processor to use MOSS approved images

* update dockerfile

* remove all hyphens

* Update Dockerfile

* install python from apt-get

* Update container_test.yaml

* Update container_test.yaml

* install node from apt-get

* Update container_test.yaml

* Update Dockerfile

Source-Link: googleapis/synthtool@1752b90
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:da69f1fd77b825b0520b1b0a047c270a3f7e3a42e4d46a5321376281cef6e62b

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: d-goog <188102366+d-goog@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:c7e4968cfc97a204a4b2381f3ecb55cabc40c4cccf88b1ef8bef0d976be87fee
-# created: 2025-04-08T17:33:08.498793944Z
+  digest: sha256:da69f1fd77b825b0520b1b0a047c270a3f7e3a42e4d46a5321376281cef6e62b
+# created: 2025-06-02T21:06:54.667555755Z