Revert "Issue #3443493 by smustgrave, Gábor Hojtsy, mikelutz: Remove deprecated code from lib/State and lib/Session"

This reverts commit d494e667.

Issue #3443493 by smustgrave, Gábor Hojtsy, mikelutz: Remove deprecated code from lib/State and lib/Session

Issue #3440043 by mondrake, longwave, larowlan, alexpott: Stop triggering a warning in MySQL's TransactionManager rollback

Issue #1561214 by mfb, sun, fietserwin, drzraf, sdrycroft, nicxvan: Bootstrap sets C locale, but does not set UTF-8 character encoding

Issue #3439925 by simonbaese, smustgrave, vensires: Fix Core tests that rely on UID1's super user behavior

Issue #3088643 by amateescu, Gábor Hojtsy, catch, smustgrave: Mark Workspaces as a stable core module

Issue #3158130 by longwave, Berdir, voleger, mayurjadhav, ranjith_kumar_k_u, _pratik_, smustgrave, acbramley: Many calls to ContextRepository::getAvailableContexts() due to entity upcasting

Issue #3439932 by phenaproxima, narendraR, Wim Leers, larowlan: Add validation constraints to system.image and system.image.gd

Issue #3437566 by mondrake, longwave, catch, smustgrave, alexpott: Refactor trigger_error in TypedConfigManager

Issue #3427564 by phenaproxima, Wim Leers, alexpott, omkar.podey, Berdir, smustgrave, larowlan: Require `langcode: …` only for simple config that contains translatable values

Issue #3001496 by jonathanshaw, SmovS, Prashant.c, ptmkenny, smustgrave, manish-31, alexpott, bojanz, tedbow, elber, Berdir, quietone: Add an alter hook to EntityQuery

Issue #3419690 by longwave, mondrake, immaculatexavier, alexpott: Find an alternative to trigger_error in Drupal\Core\Database\Query\Condition::compile

This reverts commit 5a9ce8cf.

Issue #3427172 by mondrake, longwave: Replace calls to ::expectWarning*() from Drupal\KernelTests\Core\Config\ConfigInstallTest

Issue #3402713 by mstrelan, smustgrave, dww: Fix strict type errors: miscellaneous fixes in core Kernel tests

Issue #540008 by kristiaanvandeneynde, Spokje, daffie, clayfreeman, alexpott, eelkeblok, michaelfavia, ianthomas_uk, zaporylie, johnwebdev, abhisekmazumdar, anmolgoyal74, greggles, quietone, shaal, catch, rivimey, AaronMcHale, Berdir, ndf, xjm, finne, Wim Leers, esolitos, heddn, webchick, Bojhan, andypost, efpapado, benjifisher, lauriii, Gábor Hojtsy, moshe weitzman, harings_rob: Add a container parameter that can remove the special behavior of UID#1

Issue #3402294 by mstrelan, quietone, dww, smustgrave: Fix strict type errors: Convert FormattableMarkup to strings (complex replacement) in core Kernel tests

Issue #3426506 by kim.pepper, smustgrave, mstrelan, alexpott: Create enums for File exists options and deprecate consts

Issue #3419621 by dburiak, sijumpk, smustgrave, pameeela, alexpott: tablePositionSticky should not be called on a non-array variable

Issue #3257457 by DieterHolvoet, scott_euser, smustgrave, ankithashetty, alexpott, larowlan, Berdir, dww: AmbiguousBundleClassException if multiple entity types share the same class

Revert "Issue #3437566 by mondrake, smustgrave: Replace trigger_error in TypedConfigManager with a logger"

This reverts commit fb5a0600.

Issue #2575105 by Berdir, catch, longwave, quietone, kristiaanvandeneynde, andypost, alexpott, mathilde_dumond, pradhumanjain2311, amateescu, Wim Leers, xjm: Use cache collector for state

Issue #3431452 by godotislate, smustgrave, alexpott: Rename RenderElement and FormElement plugin abstract classes to RenderElementBase and FormElementBase

Issue #3436468 by longwave, smustgrave, alexpott: AjaxResponseSubscriber should lazily instantiate AjaxResponseAttachmentsProcessor

Issue #3432601 by catch, quietone, smustgrave: Add deprecation/bc support for library-overrides when files are moved

Issue #3352256 by e0ipso, plopesc, bbrala, longwave, dww, catch, larowlan: Move code from the experimental SDC module to core

Issue #3376846 by kristiaanvandeneynde, larowlan, smustgrave, catch: Implement the new access policy API

Issue #3353918 by Spokje, longwave, rpayanm, mondrake: Fix PHPStan L1 errors "Variable $foo might not be defined." caused by non-exhaustive switch statements

Issue #3392903 by borisson_, Wim Leers, phenaproxima: Validate inputs of TypeResolver::resolveExpression(): only allow %parent, %type and %key

Issue #3433091 by mondrake: Method getMockForTrait() of class PHPUnit\Framework\MockObject\MockBuilder is deprecated in PHPUnit 10

Revert "Issue #3370946 by kunal.sachdev, lauriii, tim.plunkett, omkar.podey, alexpott, ckrina, smustgrave, larowlan, rkoller, hooroomoo, duadua: Page title should contextualize the local navigation"

This reverts commit ad606a8f.

Issue #3415582 by nico.b, larowlan, Matt B: Unhandled exception when trying to register a duplicate username with different case