test: migrate math/base/special/lnf to ULP-based assertions

[Devansh-18155]

Resolves a part of #11352.

Description

What is the purpose of this pull request?

This pull request:

• Migrates polynomial evaluation tests in math/base/special/lnf (test.polyval_p.js and test.polyval_q.js) from relative tolerance assertions to ULP difference assertions using @stdlib/number/float32/base/assert/is-almost-same-value.
• Updates the tests to require a minimum ULP bound of 1.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

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

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

I used AI assistance for identifying unmigrated polynomial test files in lnf, and verifying the minimum ULP bound.

---

@stdlib-js/reviewers

[kgryte]

Left initial comments.

[kgryte]

LGTM

[stdlib-bot]

Coverage Report

No coverage information available.