added docs for noisy_approx_set_sfm_from_index_and_zeros

[fazalmajid]

Description

Added documentation for noisy_approx_set_sfm_from_index_and_zeros to the new noisy approximation functions section added in #22715

Motivation and Context

Documentation for this new function, as requested by #22508

Impact

Docs only

Test Plan

Build docs and inspect, verify links to reference PDFs in bibliography

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Release Notes

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== RELEASE NOTES ==

General Changes
* Add documentation for :func:`noisy_approx_set_sfm_from_index_and_zeros`

[steveburnett]

Really nice work! A few nits to consider.

[fazalmajid]

@steveburnett OK, I made the changes, and clarified that if col_zeros exceeds precision, it is cropped to precision-1

[steveburnett]

LGTM! (docs)