Issue #3087602 by Charlie ChX Negyesi, kim.pepper, mondrake, larowlan: DeprecatedArray implements \ArrayAccess, traversals not possible

(cherry picked from commit 31314fca)

(cherry picked from commit 1c4e7f7f)

Issue #2860644 by daffie, shashikant_chauhan, dww: Add support of NOT REGEXP operator to PostgreSQL + fix testRegexCondition

(cherry picked from commit 70e8937c)

Issue #3087531 by jibran, xjm: Use Diactoros LTS version 1.7, not 1.8 which is out of security coverage

(cherry picked from commit f123666e)

Issue #2044435 by mondrake, kim.pepper, Mile23, andypost, martin107, daffie, jibran, beejeebus, alexpott, larowlan, dawehner, catch, pwolanin: Convert pager.inc to a service

(cherry picked from commit 38741fcb)

(cherry picked from commit 55a2b407)

Issue #3034242 by oknate, phenaproxima, Wim Leers, webchick, seanB, larowlan, bnjmnm, jrockowitz, ckrina, benjifisher, andrewmacpherson, dww, jibran: Hide "Save and insert" and "Additional selected media" from users by default

(cherry picked from commit c6c18413)

Issue #3007832 by amateescu, Berdir, andypost, alexpott: Convert custom path alias forms to entity forms

(cherry picked from commit f9528c5b)

Issue #2934026 by Sam152, govind.maloo, vacho, Jo Fitzgerald, amateescu, Berdir, mikelutz: Deprecate isLatestRevision, getLatestRevision, getLatestRevisionId in the ModerationInformation service

(cherry picked from commit 9f7df658)

Issue #2894479 by Sam152, alexpott, amateescu, Berdir, larowlan: Deprecate the Views relationship from moderated content to the "content_moderation_state" entity

(cherry picked from commit 1d386c5d)

Issue #3009014 by amateescu, mikelutz, quietone, heddn: Convert path alias migrations to use entity:path_alias destination

(cherry picked from commit 445132df)

Issue #3075695 by kim.pepper, andypost, jhodgdon, larowlan, pwolanin, Sam152: Move search_index() and related functions to a service

(cherry picked from commit 7dc65c5c)

Revert "Issue #3062281 by rpsu, acbramley, xjm, catch, Berdir: Deprecate and remove block_place module in Drupal 9"

This reverts commit 93b7946d.

(cherry picked from commit d9b0b9b04a23ea72718ea439e076c3e343fe1d9e)

Issue #2863188 by acbramley, Erik Frèrejean, Maouna, andypost, init90, larowlan, hchonov, sathish.redcrackle, vasi1186, chr.fritsch, tstoeckler, Krzysztof Domański, phjou, jibran, alexpott, catch, xjm: Hardcoded result size limit in the entity reference autocomplete widget

(cherry picked from commit 11089096)

Issue #2981889 by Nebel54, acbramley, timodwhit, bkosborne, fago, josephdpurcell, tim.plunkett, eiriksm, Sam152, grantkruger, shaal, gnikolovski: Performance Degradation in Layout Builder and other places likely

(cherry picked from commit 57aabd2b)

Issue #3070521 by lauriii, tedbow, Wim Leers, larowlan, justafish, zrpnr, alexpott, catch: Trigger deprecation notifications on JavaScript deprecations to notify developers that deprecated code is being used

(cherry picked from commit 1b0c006a)

Issue #2964789 by phenaproxima, capysara, J.Gayathri, webchick, seanB, samuel.mortenson, Wim Leers, xjm, balsama, katherined, mradcliffe, JeroenT, bnjmnm, starshaped, oknate, RoloDMonkey: Document the Media Library module

(cherry picked from commit 6ea36484)

Issue #3062281 by rpsu, acbramley, xjm, catch, Berdir: Deprecate and remove block_place module in Drupal 9

(cherry picked from commit f2955eb5)

Issue #3055648 by bnjmnm, alexpott, Krzysztof Domański, phenaproxima, oknate, larowlan: Frequent random fail in \Drupal\Tests\media_library\FunctionalJavascript\MediaLibraryTest

(cherry picked from commit 312ce8ec)

Issue #2873389 by mgifford, andrewmacpherson, RachelOlivero, mradcliffe: ARIA role="form" on contextual menu buttons is unnecessarily verbose and misleading for screen readers

Issue #3063216 by seanB, phenaproxima, Wim Leers, effulgentsia, Lendude, alexpott, xjm, gabesullice, webchick: Inaccessible Media entities still have rows generated for them in the Media Library view, containing form wrapper markup *and* the media label

Issue #3086096 by oknate, phenaproxima, tedbow, Wim Leers, andrewmacpherson, droplet, bnjmnm: Add a generic Ajax Message command

Issue #2664830 by jhodgdon, alexpott, andypost, Charlie ChX Negyesi, scott_euser, oknate, vijaycs85, larowlan, Amber Himes Matz, pwolanin, Berdir, Wim Leers: Add search capability to help topics

Issue #3081587 by seanB, shaal, phenaproxima, webchick, Berdir, Gábor Hojtsy, plach: Multilingual content is shown double in the media library view

Issue #3068275 by Wim Leers, alexpott, shimpy, gabesullice, xjm: Add status report message about JSON:API's read-only mode

Issue #3086952 by mikelutz, quietone: Migration Lookup should catch PluginNotFoundException exceptions and ignore them

Issue #2981105 by phenaproxima, JeroenT, seanB, catch: Media Library should not modify the media view

Issue #3049943 by bnjmnm, phenaproxima, Wim Leers, lauriii, alexpott: Media library should not use js- prefixed CSS classes for styling

Issue #3084069 by Wim Leers, kamalzairig, zrpnr, tinko, webchick, lauriii, tedbow, ckrina: Allow marking themes as experimental

Issue #2922417 by alexpott, Calystod, DanielVeza, Pasqualle, Berdir, hchonov, effulgentsia, pfrenssen, tstoeckler: Profile provided configuration entities can have unmeetable dependencies

Revert "Issue #2863188 by acbramley, Erik Frèrejean, Maouna, andypost, init90, larowlan, sathish.redcrackle, vasi1186, chr.fritsch, tstoeckler, phjou, jibran, hchonov, alexpott, catch: Hardcoded result size limit in the entity reference autocomplete widget"

This reverts commit 438f3839.

Issue #3086001 by Krzysztof Domański, alexpott: CreateSampleEntityTest::testSampleValueContentEntity can randomly fail

Issue #3079029 by bircher, ricardoamaro, catch, wouter.adem, marcvangend, alexpott: Move module config exclusion from config_environment to core.services