docs(samples): add auto-generated Node samples (#501)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 398604509

Source-Link: googleapis/googleapis@6ef16b9

Source-Link: https://github.com/googleapis/googleapis-gen/commit/8314e1ead3e906dbf2012ced8d92f2bc8dd45c95
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiODMxNGUxZWFkM2U5MDZkYmYyMDEyY2VkOGQ5MmYyYmM4ZGQ0NWM5NSJ9

kms/package.json

@@ -8,7 +8,7 @@
   "author": "Google LLC",
   "repository": "googleapis/nodejs-kms",
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "scripts": {
     "test": "c8 mocha --recursive test/ --timeout=800000"