Fi-1930: Custom Result Rollup

[vanessuniq]

Summary

This PR enhances the result rollup feature to support custom result logic through a user-defined block. The changes include:

• New ResultCollection class: manages a collection of Inferno::Entities::Result objects
• Updated TestGroup and TestSuite Classes: now has a customize_passing_result method that sets/ gets the custom block to define the passing criteria.
• Updated Inferno::ResultSummarizer and Inferno::TestRunner: now takes custom result block into account when determining the overall result of a TestGroup or TestSuite.

Testing Guidance

• Review changes.
• Run unit tests and ensure passing
• Run the new dev suite Custom Result Suite and ensure correct behavior