Replace List<> with Mem_root_dynamic_array for double and uint types

[bsrikanth-mariadb]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces Mem_root_dynamic_array, a typesafe wrapper around MEM_ROOT_DYNAMIC_ARRAY, and refactors optimizer context replay code to use it instead of standard lists. Feedback on these changes includes: directly accessing subquery_runs in dump_sql_script to avoid pointer indirection; removing a redundant and buggy sentinel check on a double in dbug_print_read_stats; adding a missing bounds check in the const overload of at(); fixing potential undefined behavior in end() when the array is empty; and correcting a misleading comment on pop().

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