Move Security Inventory to GA (General Availability)
We are ready to move **Security Inventory** to GA. This will be done in combination with moving Security Attributes to GA. Some merge requests (MR) may be made that make the relevant changes to Security Attributes and Security Inventory in the same MR.
Tasks:
* [x] Update necessary code - [MR](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/221969)
* [x] Update documentation - (MR - same as above)
* [x] Announce via release post
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