feat: allow ignoring findings by type in Rego

[nikpivkin]

Description

Allow ignoring findings by type in Rego to avoid conflicts when multiple finding types share fields with the same name.

Related issues

• Close Specify the type of finding to ignore via Rego #6450

Checklist

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• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
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