Werk #17076: Fix float rule values not checking all validations

In Checkmk, it's possible for any rule value to specify custom validation functions to stop users from accidentally entering invalid data. Before this werk, the set of rule fields that allowed floating point values to be set in rare cases did not check these custom validation functions when setting up a rule.

With this werk, we restore the expected functionality and check the validity of all floating point values in a rule.

Incompatibility

Some users might have created rules which should not have been valid. You will find out if such a rule is present in your setup when you update your site. The update process will raise an error warning you of any rule values that break custom validators. This error will tell you about the invalid rule and the reason it is invalid. Please abort the update process, fix the invalid value and restart the update process.

Plugin developers

If you have created a rule value with the validate (ValueSpec) or custom_validate (Form Spec) argument set, your rule will now correctly use provided functions to check the validity of the data. No change to the rule is necessary.

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