Audit serialize() and serializeToArray() overrides for splitting explain output generation

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    • Type: Improvement
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: None
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    • Query Execution
    • QE 2025-09-29, QE 2025-10-13
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      SERVER-109085 added a virtual agg::Stage::getExplainOutput() method, so that execution-relevant explain code can be moved to agg::Stage subclasses.

      Unfortunately, some DocumentSource subclasses were already split without using this new method. We need to re-visit these stages and check if we can improve the splitting by using this new method.

        1.
        		 Move QE-related explain part from $group SERVER-111040 Sub-task Closed Romans Kasperovics 8.3.0-rc0
        2.
        		 Refactor QE-related explain part from $sort SERVER-111042 Sub-task Open Romans Kasperovics  

            Assignee:
            Romans Kasperovics
            Reporter:
            Romans Kasperovics
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              Created:
              Updated: