Revert "Issue #2458817 by Berdir, dawehner: Creating new user entities for anonymous users is very slow"

This reverts commit fcbb3c0c.

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2433599 by Wim Leers: Ensure every (non-views) pager automatically associates a matching cache context

Issue #2435493 by effulgentsia: Change String::format()'s '@' and '%' placeholders to be auto-escaped rather than always-escaped

Issue #2091321 by er.pushpinderrana, jhodgdon, rootwork, ifrik, mparker17: Update hook_help for Field and Field UI module

Issue #2399307 by larowlan, SteffenR: comment_form_field_ui_field_storage_edit_form_alter() no longer working

Issue #2309737 by rpayanm, hussainweb, max-kuzomko, herom, millerbennett, ianthomas_uk, quietone, Sutharsan, sumitmadan, toddmbloom: Remove deprecated format_plural usage

Issue #2281619 by dawehner, tim.plunkett: Convert most direct usages within module code of routing related request attributes to use RouteMatchInterface instead

Issue #2217731 by crowdcg, lauriii, davidhernandez, aczietlow, jjcarrion, mortendk, karolus, pakmanlh, LewisNyman, aboros, joshua.boltz: Move field classes out of preprocess and into templates

Issue #1963340 by amateescu, dags, andypost, agentrickard, mgifford, yoroy, pguillard, jibran, YesCT, xjm, LewisNyman, swentel, Hydra, yched, tim.plunkett, rteijeiro, ainz, Xano, Bojhan, Berdir: Change field UI so that adding a field is a separate task

Issue #2318813 by Devin Carlson, Lowell: Comment module: Fix documentation that refers to enabling/disabling of modules

Issue #2329783 by lauriii, jamesquinton | davidhernandez: Move comment classes from preprocess to templates.

Issue #2246675 by rpayanm, johnstorey, holly.ross.drupal | mgbellaire: Remove all unnecessary 'template' lines in hook_theme() declarations.

Issue #2229435 by lauriii, joelpittet, Rade: Clean up the way attributes are printed in field.html.twig.

Issue #2277103 by tim.plunkett, pwolanin, Wim Leers, dawehner, hotpizzas: Switch Drupal::l() and LinkGenerator to expect a Url object.

Issue #2100343 by Berdir, fago, martin107, visabhishek, sriharsha.uppuluri, Yorirou: Remove 'fieldable' key in entity definitions in favour of 'field_ui_base_route'.

Issue #2343651 by xjm, tim.plunkett, Wim Leers, dinarcon, dawehner: Remove most remaining l() calls.

Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.

Issue #2328411 by dawehner, geerlingguy, herom: Convert all permissions to yml files and permission callbacks.

Issue #2271349 by Berdir, Arla, blueminds, larowlan, Dave Reid: Node and Comment ops links should be display components (which can be disabled).

Issue #2273277 by Wim Leers, effulgentsia, Fabianx: Fixed Figure out a solution for the problematic interaction between the render system and the theme system when using #pre_render.

Issue #2318251 by larowlan: Fixed Make comment links functionality testable and convert CommentLinkTest to PHPUnit.

Issue #2078473 by blueminds | Berdir: Added Use entity access API for checking access to private files.

Issue #1962846 by andypost, Wim Leers, InternetDevels: Use field instance name for header of comment list, drop comment-wrapper template.

Issue #2156089 by roderik, slashrsm, larowlan, andypost: Remove comment_get_thread() in favour of method on CommentStorage.

Issue #2287727 by yched, swentel, alexpott: Rename Field[instance]Config classes and entity types (again).