Issue #3332593 by phenaproxima, Wim Leers, borisson_, lauriii, tim.plunkett: Adopt PluginExists validator in relevant places

Issue #2873789 by ponies, Wim Leers, xjm: Add change record to @deprecated for TypeLinkManagerInterface

Issue #2869904 by tstoeckler: Config schema missing for less common HTTP methods in REST resources configured using 'method' granularity

Issue #2758897 by Wim Leers, damiankloip, larowlan: Move rest module's "link manager" services to serialization module

Issue #2664780 by Wim Leers, tedbow, dawehner, klausi: Remove REST's resource- and verb-specific permissions for EntityResource, but provide BC and document why it's necessary for other resources

Revert "Issue #2664780 by Wim Leers, tedbow, dawehner, klausi: Remove REST's resource- and verb-specific permissions for EntityResource, but provide BC and document why it's necessary for other resources"

This reverts commit 85d755a9.

Issue #2664780 by Wim Leers, tedbow, dawehner, klausi: Remove REST's resource- and verb-specific permissions for EntityResource, but provide BC and document why it's necessary for other resources

Issue #2228141 by juampynr, eiriksm, dawehner, almaudoh, lokapujya, mohit_aghera, clemens.tolboom, manojapare, Lendude, Sonal.Sangale, Wim Leers, alexpott, damiankloip, andypost: Add authentication support to REST views

Issue #2308745 by Alumei, dawehner, Wim Leers, larowlan, Arla, alexpott, g.oechsler, R.Muilwijk, Berdir, catch, klausi, clemens.tolboom, MattA, Crell: Remove rest.settings.yml, use rest_resource config entities

Issue #2459971 by Gábor Hojtsy: The langcode key on configuration files is not explicit in configuration schema

Issue #2381973 by Gábor Hojtsy, vijaycs85, dawehner: View wizard creates 'invalid' views out of the box, missing plugin_ids, insecure permissions

Issue #2167623 by danilenko_dn, sidharthap, Nitesh Sethia, krishnan.n, aitiba, alexpott, ashwinikumar, Barrett, damiankloip, deepakaryan1988, foxtrotcharlie, ianthomas_uk, neetu morwani, nonsie, piyuesh23, Sharique, sivaji, sushantpaste, swentel, vijaycs85, YesCT: Add test for all default configuration to ensure schema exists and is correct.