feat: add stats/incr/nanmsumabs2

[gkbishnoi07]

Resolves #5612

Description

What is the purpose of this pull request?

This pull request:

• add stats/incr/nanmsumabs2

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves no related issues.

Questions

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No.

Other

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No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nanmsumabs2	$146/146$ $+100.00\mathrm{\%}$	$10/10$ $+100.00\mathrm{\%}$	$2/2$ $+100.00\mathrm{\%}$	$146/146$ $+100.00\mathrm{\%}$

The above coverage report was generated for the changes in this PR.

[gkbishnoi07]

@anandkaranubc @kgryte please review this PR

[gkbishnoi07]

@kgryte I've updated the PR to reflect the changes. Please take a moment to review it

[gkbishnoi07]

@kgryte PTAL

[gkbishnoi07]

@kgryte @anandkaranubc need review