Integrity testing: Check published kickstart files integrity (#5689)
* netdata/packaging/ci: Integrity testing Introduce a scriptlet that validates kickstart integrity in my-netdata.io against the ones in the repo. Run this through the pipeline on a scheduled manner. Will refine the conditionals later, once i verify the stage is built up as expected * netdata/packaging/ci: remove conditionals first * netdata/packaging/ci: Adjust the names to something more appropriate. Run it along with nightlies * netdata/packager/ci: Cleanup checksum validation for kickstart files (continued) 1) merge validate_kickstart_integrity.sh and tests/installer/checksums.sh 2) run checksums at the new point on the pipeline 3) Change that unstable gitignore check and use a more file-agnostic check that depends only on git that we already require 4) Do not run the kickstart validation on the online website everywhere, only on the nightly runs * netdata/packaging/ci: First rounf of PR feedback adjustments 1) changes wordings as recommended 2) pass file info in parameter and use it in the wordings 3) as shellcheck suggests, use -n instead of ! -z. Makes sense actually, ! -z is kind of reverse logic that confuses More adjustments on a follow up commit * netdata/packaging/ci: Enable slack integration for kickstart validation We want to be notified in a timely manner when the kickstart on the website is outdated. Added a wrapper for incoming webhooks from slack and instead of failing the build we notify slack Added a debug message in the end of the script to validate the process which i will remove on a follow up commit * netdata/packaging/ci: fixes fix sourcing path missed the /, this new keyboard is a pain :p