Issue #2843358 by alexpott, mallezie, dawehner: Postgres fail in Drupal\Tests\path\Kernel\Migrate\d6\MigrateUrlAliasTest

(cherry picked from commit 05b64e07)

(cherry picked from commit 7f81be33)

(cherry picked from commit 24896672)

Issue #2485385 by phenaproxima, quietone, alexpott, mikeryan, Berdir, blazey, xjm, hussainweb, catch, heddn, benjy: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface

(cherry picked from commit 4259a06c)

Revert "Issue #2485385 by phenaproxima, quietone, Berdir, blazey, hussainweb, mikeryan, benjy, alexpott: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface"

This reverts commit 7c8ebc31.

Issue #2485385 by phenaproxima, quietone, Berdir, blazey, hussainweb, mikeryan, benjy, alexpott: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface

(cherry picked from commit 0308eb77)

Issue #2539634 by Berdir, dawehner, cilefen, mpp, claudiu.cristea, amateescu, kristiaanvandeneynde: PathItem::delete() never runs because the path field type is a computed field in disguise

(cherry picked from commit f3119f6a)

(cherry picked from commit a7b67e7a)

Revert "Issue #2560795 by mikeryan, phenaproxima, penyaskito, willwh, benjy: Source plugins have a hidden dependency on migrate_drupal"

This reverts commit 89815ba3.

Issue #2560795 by mikeryan, phenaproxima, penyaskito, willwh, benjy: Source plugins have a hidden dependency on migrate_drupal

Issue #2754003 by Berdir, Wim Leers: Move more cache items from the default to the bootstrap or discovery bin

Issue #2752149 by marcoscano, ifrik: "filter" button should be normal (grey) instead of primary (blue)

Issue #2683431 by penyaskito, EclipseGc, dawehner: PathItem doesn't return correct main property from mainPropertyName()

Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

Issue #2714375 by kiamlaluno, malavya: hook_form_alter() implementations are still commented with a reference to a form builder that doesn't exist anymore

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2697909 by pguillard, himanshugautam, snehi, aburrows, jhodgdon: Fix "login (noun/adjective)" vs. "log in (verb)" in comments (and logout/log out)

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2676222 by alexpott, johnrosswvsu: Move MigrationInterface out of the migrate\Entity namspace now they are plugins

Issue #2625696 by chx, benjy, alexpott, catch, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities

Revert "Issue #2625696 by chx, alexpott, benjy, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities"

This reverts commit 694994fe.

Issue #2625696 by chx, alexpott, benjy, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities

Issue #2672604 by saurabh.tripathi.cs: Replace deprecated usage of entity_create('taxonomy_term') and entity_create('taxonomy_vocabulary') with a direct call to Term::create() and Vocabulary::create()

Issue #2226455 by quietone, ultimike, brockfanning: Migrated URL aliases not working until nodes are re-saved

Issue #2664466 by dawehner, alexpott, kostyashupenko: url_alias table is only used by a core service but it depends on system install

Issue #2630162 by felribeiro, pguillard, pingwin4eg, karsumit94: The Edit URL Alias form buttons should be styled in consistency with other buttons

Issue #2539222 by sasanikolic: Exception when deleting a translation when there is no canonical link template

Issue #2616336 by alexpott: PathAliasTest is using the RandomGeneratorTrait causing unnecessary output in the testbot logs

Issue #2584243 by stefan.r, pwolanin, dawehner, kgoel: Make Drupal handle  path aliases in a consistent and case-insensitive fashion on all database drivers

Issue #2502621 by Pravin Ajaaz, hussainweb, Peacog, jhodgdon, ivanjaros: Replace implement notes with inheritdoc tag