Revert "Issue #3162016 by longwave, andypost, Hardik_Patel_12, catch, alexpott, daffie, Kristen Pol: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated"

This reverts commit 8b8fc1ef.

Issue #84883 by quietone, alexpott, DuaelFr, scor, roderik, TR, pillarsdotnet, jungle, ayushmishra206, greggles, dww, ximo, Hardik_Patel_12, netbjarne, kiamlaluno, longwave, earnie: Unicode::mimeHeaderEncode() doesn't correctly follow RFC 2047

Issue #3215830 by longwave: Symfony 6 KernelEvent bridge is incompatible with Symfony 5 EventDispatcher

Issue #3162016 by longwave, andypost, Hardik_Patel_12, catch, alexpott, daffie, Kristen Pol: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated

Issue #3214565 by Spokje, longwave, alexpott, Lendude: [random test failure] Random fail in BuildTestTest::testPortMany

Issue #3213295 by effulgentsia, tedbow, longwave, Spokje, xjm, catch: Update Symfony 5 components to 5.3-rc1

Issue #3209617 by longwave, daffie, catch: [Symfony 6] Symfony\Component\HttpFoundation\RequestStack::getMasterRequest() is deprecated, use getMainRequest() instead

Issue #3186364 by effulgentsia, longwave, xjm, jungle, alexpott, greg.1.anderson: Allow pre-release dependencies in Drupal pre-release milestones

Issue #3202493 by jenniferaube, vsujeetkumar, Sakthivel M, bnjmnm, manojithape, mgifford, guilhermevp, Gauravmahlawat, lauriii, zrpnr, mradcliffe: Claro is missing focus in "Available buttons" within CKEditor toolbar configuration

Issue #3186661 by Spokje, longwave, mondrake, paulocs, daffie: [May 24, 2021] Remove usage of drupalPostForm

Issue #3133162 by jungle, ravi.shankar, Deepak Goyal, Neslee Canil Pinto, anmolgoyal74, xjm, Kristen Pol: Replace the start verb Test with Tests in method comments of tests

Issue #3214140 by Gauravmahlawat, manojithape, mitthukumawat: Olivero: Message icon has border radius in firefox browser

Issue #1870006 by nod_, BarisW, alwaysworking, Renrhaf, pk188, andrewmacpherson, ranjith_kumar_k_u, vikashsoni, Gauravmahlawat, wolffereast, Wim Leers, jessebeach, xjm: HTML5 validation with table sticky header is misaligned over the toolbar

Issue #3189463 by quietone, Wim Leers, adityasingh, ayushmishra206: all translation/localization migrations should depend on the 'language' migration

Issue #3195888 by alexpott, quietone: Check dependencies are correct in core/scripts/dev/commit-code-check.sh

Issue #3109767 by quietone, mtodor, Kristen Pol, larowlan: Unable generate sample data with defined random seed for the "string" or "link" field type

Issue #3191782 by quietone, Wim Leers, mohit_aghera: Fix dependency in d6 user profile translation migrations

Issue #3213557 by Sakthivel M, guilhermevp, tushar_sachdeva: Display title checkbox is misaligned in Configure dialog box of layout builder

Issue #3200628 by tushar_sachdeva, chetanbharambe, mherchel: Olivero's small button variation's text seem vertically mis-aligned

Issue #3173012 by mherchel, kiran.kadam911, andy-blum, Gauravmahlawat, ankithashetty, djsagar, proeung: Olivero header-search-wide.pcss.css and header-search-narrow.pcss.css adjustments

Issue #3139404 by mondrake, munish.kumar, pavnish, longwave: [May 25, 2021] Replace usages of AssertLegacyTrait::assertText, that is deprecated

Issue #3131281 by mondrake, rahulrasgon, longwave, ridhimaabrol24, naresh_bavaskar, jungle, daffie: [May 17th 2021] Replace assertEqual() with assertEquals()

Issue #3210443 by mherchel, bnjmnm, andy-blum, guilhermevp, Gauravmahlawat, Rinku Jacob 13: Olivero: Focus after submenu close via ESC key

Issue #3144854 by Spokje, bnjmnm, mherchel, zrpnr, komalk, Kristen Pol: Remove stylelint-no-browser-hacks

Issue #3051766 by bnjmnm, alexpott, Oleksiy, finnsky, zrpnr, jungle, Wim Leers, vacho, anmolgoyal74, lauriii, tim.plunkett, rachel_norfolk, andypost, catch, Gábor Hojtsy, nod_, fubarhouse: Deprecate and replace jQuery Joyride (for tours)

Issue #3126747 by phenaproxima, tim.plunkett, TR, Spokje: ContextDefinition::create() can no longer be used with an entitytype-specific datatype (like entity:user)

Issue #3207968 by quietone, longwave, Spokje: Replace @codingStandards comments with phpcs: comments

Issue #3211838 by mondrake, longwave: Convert assertions involving use of xpath on spans to WebAssert