test: add and modify tests in math/base/special/maxabs

[gunjjoshi]

Description

What is the purpose of this pull request?

This pull request:

• addresses feat: add math/base/special/maxabsf #2829 (comment)
• adds the missing second NaN argument in a test in test.js.
• adds the missing test where both inputs are NaN in test.native.js.
• moves the tests which have inputs as PINF to another section in test.native.js, similar to what we have in test.js.
• updates the test descriptions to use expected value.

Related Issues

Does this pull request have any related issues?

None.

Questions

Any questions for reviewers of this pull request?

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-js/reviewers

[Planeshifter]

Thank you!