[FXC-7659] Added user guide ref to run control docstrings

[piotrkluba]

Note

Low Risk
Low risk documentation-only change that adds cross-references in docstrings; no runtime behavior or validation logic is modified.

Overview
Adds a user-guide cross-reference (:ref:\Run Control `) to the docstrings for RunControlandStoppingCriterion` to make the API docs point readers to the run control overview.

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