Fix(Inventory): add missing osname value from inventory process

[stonebuzz]

Checklist before requesting a review

Please delete options that are not relevant.

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.
• This change requires a documentation update.

Description

• It fixes !41380

Fix the issue where the osname criterion, defined in RuleImportAsset and used by RuleDefineItemtype, is never populated by the inventory when the rules are executed.

Screenshots (if appropriate):

[trasher]

I'm not 100% sure because rules here will run on the raw OS name, that may have been changed after OS are handled.

Anyway, please add a tests case; I'll use it to inspect issue on my side.