MM-56630 Scroll Fix of center panel (#30144)

* pageup/pagedown button scroll for center post-list

* revert package.json

* changing id, using ? and returning in keyHandler

* added e2e test for pageup/pagedown scroll

* Fix dynamic-virtualized-list not being in lockfile and update path

Moving the package under the MM namespace wasn't necessary, but it stops
some warnings from NPM.

* Move E2E test from Cypress to Playwright

Cypress's cy.type doesn't seem to properly trigger browser functions
because it doesn't seem to use native keyboard events. A newer version
of Cypress has a new cy.press method which is supposed to use native
keyboard events, but it also only supports the tab key currently, so it
wouldn't be useful here.

* Fix new test on iPad

* Add page up/down support to RHS and Threads view

* Update type definitions for dynamic-virtualized-list

---------

Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

webapp/channels/package.json

@@ -13,6 +13,7 @@
     "@mattermost/client": "*",
     "@mattermost/compass-components": "^0.2.12",
     "@mattermost/desktop-api": "5.10.0-2",
+    "@mattermost/dynamic-virtualized-list": "github:mattermost/dynamic-virtualized-list#08dde0c34a12d0384740db27d55e398d139d7a51",
     "@mattermost/types": "*",
     "@mui/base": "5.0.0-alpha.127",
     "@mui/material": "5.11.16",
@@ -33,7 +34,6 @@
     "crypto-browserify": "3.12.0",
     "css-vars-ponyfill": "2.4.8",
     "date-fns": "2.29.3",
-    "dynamic-virtualized-list": "github:mattermost/dynamic-virtualized-list#3fe918b41de4cb08dbf43f1207bb58827b38e833",
     "emoji-regex": "10.2.1",
     "exif2css": "1.3.0",
     "fast-deep-equal": "3.1.3",