tests: also disable 'node18' tests in continuous/nightly for now (#1763)

* tests: also disable 'node18' tests in continuous/nightly for now

* tests: exclude changes in owlbot

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore: revert "🦉 Updates from OwlBot post-processor"

This reverts commit 1a6bdcb.

---------

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

Author: feywind

.kokoro/test.sh

@@ -62,6 +62,7 @@
             'samples/generated/v2/*',   # we don't want to encourage non-veneer use here.
             '.kokoro/samples-test.sh',  # get to green
             '.kokoro/system-test.sh',
+            '.kokoro/test.sh',
         ] + list(admin_files)
         logging.info(f"excluding files for non-admin: {excludes}")
         s.copy([library], excludes = excludes)
@@ -170,6 +171,7 @@
     '.github/workflows/ci.yaml',
     '.kokoro/samples-test.sh',  # get to green
     '.kokoro/system-test.sh',
+    '.kokoro/test.sh',
 ])
 
 node.postprocess_gapic_library_hermetic()