Issue #3372789 by aaron.ferris, larowlan: run-tests.sh references a non existent obsolete Core module's (simpletest) url

(cherry picked from commit 3325161e)

Issue #3344087 by longwave, Gauravvvv, mherchel, catch: Update Stylelint and Prettier for Drupal 10.1 and use Prettier for formatting PostCSS

Issue #3352635 by Spokje: Run yarn build:css in core/scripts/dev/commit-code-check.sh whenever core/package.json and/or core/package.lock change

Issue #3328454 by xjm, Bhanu951, jidrone, smustgrave: Replace most strpos() !== FALSE or === FALSE with str_contains()

Issue #3314151 by Wim Leers, phenaproxima, smustgrave: Fix cspell use: specify globRoot and always pass --root to cspell

Issue #3075608 by mondrake, Mile23, longwave: Introduce TestRun objects and refactor TestDatabase to be testable

Revert "Issue #3262017 by sleitner, ravi.shankar, smustgrave, xjm, longwave, quietone, Gábor Hojtsy, catch, alexpott: Country list is not correctly sorted when it's localized with accents (e.g. German, Turkish)"

This reverts commit c34b922a.

Issue #3262017 by sleitner, ravi.shankar, smustgrave, xjm, longwave, quietone, Gábor Hojtsy, catch, alexpott: Country list is not correctly sorted when it's localized with accents (e.g. German, Turkish)

Issue #2209063 by bnjmnm, Sam152, tarekdj, lauriii, Wim Leers, LewisNyman, quietone: Fix the flicker of the "active" icons when a high-latency user clicks on toolbar items

Issue #3331818 by xjm, Spokje: commit-code-check.sh gives unclear output when CSS is not properly rebuilt

Issue #1540390 by smustgrave, cosmicdreams, sun, alexpott, Chi, Mile23, dawehner, RobLoach, cweagans, David_Rothstein, webchick, borisson_, Unitoch: Deprecate the drupal.sh script

Issue #2514582 by Mile23, joachim, sahil.goyal, jhodgdon, Fabianx, dawehner: Document lazy services and fix script doxygen

Issue #3205578 by Taran2L, kevinn, Charlie ChX Negyesi, longwave: Source code disclosure with /core/scripts/transliteration_data.php.txt

Issue #3317504 by Wim Leers, penyaskito: run-tests.sh claims to support running a particular test method, but does not

Issue #3251817 by alexpott, jonathan1055, nicxvan, longwave: Make run-tests.sh select all the required tests when testgroups: has more than one value

Issue #3293446 by alexpott, daffie: Create less static cache in ExtensionDiscovery during KernelTests

Issue #3306210 by Spokje, nod_, Wim Leers, quietone, longwave, lauriii: Remove Farbtastic library from core

Issue #3278415 by nod_, lauriii, catch, Wim Leers, longwave, xjm, claudiu.cristea: Remove usages of the JavaScript ES6 build step, the build step itself, and associated dev dependencies

Issue #3263823 by Spokje, nod_, kostyashupenko, murilohp, adityasingh, pooja saraah, ravi.shankar, catch: Empty out and deprecate drupal libraries which are related to Internet Explorer 11 polyfills in 10.0.x for removal in 11.0.0

Revert "Issue #3263823 by Spokje, nod_, kostyashupenko, murilohp, adityasingh, pooja saraah, ravi.shankar: Empty out and deprecate drupal libraries which are related to Internet Explorer 11 polyfills in 10.0.x for removal in 11.0.0"

This reverts commit 99059eda.

Issue #3263823 by Spokje, nod_, kostyashupenko, murilohp, adityasingh, pooja saraah, ravi.shankar: Empty out and deprecate drupal libraries which are related to Internet Explorer 11 polyfills in 10.0.x for removal in 11.0.0

Issue #3291283 by nod_, jsutta, longwave, cilefen, alexpott, Gabbia998, ptomulik: Restore missing backbone-min.js.map

Revert "Issue #3238501 by kostyashupenko, Spokje, mherchel, nod_, longwave, lauriii, bnjmnm: Remove Internet Explorer 11 polyfills"

This reverts commit 145d7286.

Issue #3238501 by kostyashupenko, Spokje, mherchel, nod_, longwave, lauriii, bnjmnm: Remove Internet Explorer 11 polyfills

Issue #3259355 by mallezie, mondrake, catch, longwave, mglaman, alexpott, xjm, daffie, Mixologic: Always do a full phpstan analysis on DrupalCI

Issue #3112283 by ravi.shankar, mpdonadio, andregp, daffie, jhedstrom, alexpott, andypost, pifagor, vladbo, JeroenT, voleger, cliddell: Replace REQUEST_TIME in non-OO and non-module code