[Asset Discovery] Move Attributes to a flattened entity.raw

[romulets]

Move Attributes (previously dynamic mapped object) to entity.raw flattened field

Related issues

• Related https://github.com/elastic/security-team/issues/12548
• Related Move Attributes to a flattened entity.raw integrations#14084

Screenshots

[mergify]

This pull request does not have a backport label. Could you fix it @romulets? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.