chore: update random value generation and test messages

[hrshya]

Resolves none .

Description

What is the purpose of this pull request?

This pull request:

• Refactors random number generation in JS benchmarks for the math/base/special/lcm, math/base/special/kernel-betainc, math/base/special/kernel-betaincinv and math/base/special/gammasgn packages.
• Replaces randu() with uniform() from @stdlib/random/array/uniform for cleaner and more consistent code.
• Moves the random number generation outside the benchmarking loops.
• Updates the test messages to follow code conventions.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves no related issues.

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-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/gammasgn	$\color{green}175/175$ $\color{green}+100.00\%$	$\color{green}13/13$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}175/175$ $\color{green}+100.00\%$
math/base/special/kernel-betainc	$\color{red}931/1730$ $\color{green}+53.82\%$	$\color{red}29/39$ $\color{green}+74.36\%$	$\color{red}2/13$ $\color{green}+15.38\%$	$\color{red}931/1730$ $\color{green}+53.82\%$
math/base/special/kernel-betaincinv	$\color{red}2552/3171$ $\color{green}+80.48\%$	$\color{red}114/168$ $\color{green}+67.86\%$	$\color{red}23/37$ $\color{green}+62.16\%$	$\color{red}2552/3171$ $\color{green}+80.48\%$
math/base/special/lcm	$\color{green}165/165$ $\color{green}+100.00\%$	$\color{green}14/14$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}165/165$ $\color{green}+100.00\%$

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

[stdlib-bot]

PR Commit Message

chore: update random value generation and test messages

PR-URL: https://github.com/stdlib-js/stdlib/pull/6346

Co-authored-by: hrshya <[email protected]>
Reviewed-by: Philipp Burckhardt <[email protected]>

Please review the above commit message and make any necessary adjustments.