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/t/* packages.
• Replaces uniform() from @stdlib/random/array/uniform for cleaner and more consistent code.
• Moves the random number generation outside the benchmarking loops.
• Refactors to use string interpolation.

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/t/cdf	$\color{red}234/236$ $\color{green}+0.00%$	$\color{red}28/29$ $\color{green}+0.00%$	$\color{green}3/3$ $\color{green}+0.00%$	$\color{red}234/236$ $\color{green}+0.00%$
stats/base/dists/t/ctor	$\color{green}436/436$ $\color{green}+0.00%$	$\color{green}27/27$ $\color{green}+0.00%$	$\color{green}16/16$ $\color{green}+0.00%$	$\color{green}436/436$ $\color{green}+0.00%$
stats/base/dists/t/entropy	$\color{green}171/171$ $\color{green}+0.00%$	$\color{green}8/8$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}171/171$ $\color{green}+0.00%$
stats/base/dists/t/kurtosis	$\color{green}181/181$ $\color{green}+0.00%$	$\color{green}10/10$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}181/181$ $\color{green}+0.00%$
stats/base/dists/t/logcdf	$\color{green}242/242$ $\color{green}+0.00%$	$\color{green}29/29$ $\color{green}+0.00%$	$\color{green}3/3$ $\color{green}+0.00%$	$\color{green}242/242$ $\color{green}+0.00%$
stats/base/dists/t/logpdf	$\color{green}273/273$ $\color{green}+0.00%$	$\color{green}17/17$ $\color{green}+0.00%$	$\color{green}4/4$ $\color{green}+0.00%$	$\color{green}273/273$ $\color{green}+0.00%$
stats/base/dists/t/mean	$\color{green}161/161$ $\color{green}+0.00%$	$\color{green}8/8$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}161/161$ $\color{green}+0.00%$
stats/base/dists/t/median	$\color{green}161/161$ $\color{green}+0.00%$	$\color{green}8/8$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}161/161$ $\color{green}+0.00%$
stats/base/dists/t/mode	$\color{green}161/161$ $\color{green}+0.00%$	$\color{green}8/8$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}161/161$ $\color{green}+0.00%$
stats/base/dists/t/pdf	$\color{green}275/275$ $\color{green}+0.00%$	$\color{green}17/17$ $\color{green}+0.00%$	$\color{green}4/4$ $\color{green}+0.00%$	$\color{green}275/275$ $\color{green}+0.00%$
stats/base/dists/t/quantile	$\color{green}229/229$ $\color{green}+0.00%$	$\color{green}23/23$ $\color{green}+0.00%$	$\color{green}3/3$ $\color{green}+0.00%$	$\color{green}229/229$ $\color{green}+0.00%$
stats/base/dists/t/skewness	$\color{green}169/169$ $\color{green}+0.00%$	$\color{green}8/8$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}169/169$ $\color{green}+0.00%$
stats/base/dists/t/stdev	$\color{green}174/174$ $\color{green}+0.00%$	$\color{green}10/10$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}174/174$ $\color{green}+0.00%$
stats/base/dists/t/variance	$\color{green}169/169$ $\color{green}+0.00%$	$\color{green}10/10$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}169/169$ $\color{green}+0.00%$

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

[kgryte]

Suggested change

	bench( format( '%s::entropy', pkg ), function benchmark( b ) {
	bench( format( '%s:entropy', pkg ), function benchmark( b ) {

This isn't correct. When benchmarking direct property access, you should only use a single colon.

[kgryte]

Same comment. Applies here and elsewhere in this file.

[kgryte]

Apart from the benchmark naming comments, this is looking good.