[meta] Remove usage of t() in tests not testing translation

Tagging for coding standards and moving to the 'other' component where such issues live.

📌 Remove remaining uses of t() in assertEquals() calls Fixed landed.

I think we are down to the final few stragglers, opened 📌 Remove remaining unnecessary uses of t() in tests Active to cover those.

I also am leaning towards closing 📌 Remove uses of t() in setLabel() and setDescription() calls Needs work as won't fix as we are effectively testing that APIs can receive TranslatableMarkup, as they would outside of tests.

smustgrave → credited adeshsharma → .

smustgrave → credited chaitanyadessai → .

smustgrave → credited Hardik_Patel_12 → .

smustgrave → credited paulocs → .

quietone → credited dawehner → .

quietone → credited duaelfr → .

quietone → credited geertvd → .

quietone → credited joelpittet → .

quietone → credited lokapujya → .

quietone → credited mile23 → .

quietone → credited xjm → .

quietone → credited mohrerao → .

quietone → credited mrinalini9 → .

Closed that related issue and moved credit here

And the number of instances has risen since #30.

$ find core -type f -iname '*Test.php' | xargs grep '[^a-zA-Z]t(' | wc -l
274