Fix array sorting and remove unused code

What does this MR do?

• Removes ds and it from the comparison script.
• Removes ds tests from the Ruby specs.
• Only orders the top-level vulnerabilities array in SAST and SD reports, instead of recursively sorting all arrays. See the commit message for more info.

What are the relevant issue numbers?

• Not an issue, but see gitlab-org/security-products/analyzers/semgrep!152 (comment 1120704913) for context.

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug