Werk #14794: Enable using Rulesets for section plugins

This werk is relevant for you if:

• you implemented a host label function that is configurable via WATO
• you do not have a discovery function that uses the same ruleset

Previously, this was not possible. You may have encountered the following error:

Error running automation call restart (exit code 1), error:
Invalid configuration variable 'YOUR_RULESET'
--> Found 1 invalid variables
If you use own helper variables, please prefix them with _.

Anyway - this is fixed now.

To the list of all Werks