yara object: add test-sample hash attributes and false-positive flag, bump version

[adulau]

Motivation

• Enable recording of test-sample metadata (hashes) and explicit false-positive marking for YARA rules to improve rule testing and provenance.
• Clarify object description to document that test samples are treated as true positives by default and to indicate supported YARA version.

Description

• Added a false-positive boolean attribute to mark test samples as false positives, with a sane default of false and disable_correlation enabled.
• Added file-hash attributes md5, sha1, sha256, sha512, ssdeep, and tlsh for recording hashes observed while testing YARA rules.
• Updated the top-level description to mention supported YARA version and optional test-sample hashes and bumped the object version from 7 to 9.
• Minor metadata adjustments including ui-priority placements and ensuring newline at end of file.

Testing

• Ran JSON/schema validation against objects/yara/definition.json and linting checks, which passed.
• Executed the project's automated test suite/CI checks after the change, and they completed successfully.

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Codex Task