bench: update random value generation

[hrshya]

Resolves none .

Description

What is the purpose of this pull request?

This pull request:

• Refactors random number generation in JS benchmarks for the stats/base/dists/beta/median, stats/base/dists/beta/mgf, stats/base/dists/beta/mode and stats/base/dists/beta/pdf packages.
• Replaces 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

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.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/beta/median	$\color{green}119/119$ $\color{green}+100.00\%$	$\color{green}6/6$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}119/119$ $\color{green}+100.00\%$
stats/base/dists/beta/mgf	$\color{green}321/321$ $\color{green}+100.00\%$	$\color{green}22/22$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}321/321$ $\color{green}+100.00\%$
stats/base/dists/beta/mode	$\color{green}182/182$ $\color{green}+100.00\%$	$\color{green}8/8$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}182/182$ $\color{green}+100.00\%$
stats/base/dists/beta/pdf	$\color{green}387/387$ $\color{green}+100.00\%$	$\color{green}47/47$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}387/387$ $\color{green}+100.00\%$

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

[Planeshifter]

All good.

[stdlib-bot]

PR Commit Message

bench: update random value generation

PR-URL: https://github.com/stdlib-js/stdlib/pull/6812

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

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