[cetic/nifi] Deprecated script to install Node for OIDC testing.

[FredP1]

Describe the bug
The script used to install node.js is deprecated.
test-oidc.yml line 24
curl -sL https://deb.nodesource.com/setup_16.x -o nodesource_setup.sh

Version of Helm, Kubernetes and the Nifi chart:
Latest for all, Cetic NiFi 1.2 release.

What happened:
Upon installing the helm chart, the repo could not be found 3 days ago. Now when testing locally to install that version, I get the following:

How to reproduce it (as minimally and precisely as possible):
Run curl -sL https://deb.nodesource.com/setup_16.x -o nodesource_setup.sh locally.