[CI] Add a11y checks to our visual testing suite (#7047)

* Add a VISUAL_URL constant and remove all vestiges of hide inspector and tree

* hide timer and add concurrency

* turn off concurrency

* factor out old appAction

* Add expand button to panes

* remove old slow annotations

* fix fault

* update domcontentloaded

* missed refactor

* driveby: setTimeBounds private

* add comments to the percyCSS

* suggest MISSION_TIME

* more notes

* regen

* clean up test

* driveby: clean up order

* restructure

* add new suite now that i'ts hidden

* use mission time everywhere possible

* driveby

* rerun generatedata

* comments

* lint fix

* add inital pass of a11y tests

* first pass for fixing a11y problems

* update build

* add copyright

* check for slashes

* rename files

* update testcases

* update to latest

* updates

* section 508

* final version

* remove leftover

* comments

* documentation

* bad merge

* comment

* use current ruleset

* typo

* feedback

* remove time conductor due to false positives

* default to closed tabs

* add some more accessiblity checking

* change to a condition widget and update search

* lint fix

* turns this into a single function

* update doc to match single function

* update to single function

* update to new function

* lint

* update locator for search input

* fix extra page

* why

* comments

* comments

* refacotr

* wrong paths and fixes

e2e/playwright-ci.config.js

@@ -17,7 +17,7 @@ const config = {
     command: 'npm run start:coverage',
     url: 'http://localhost:8080/#',
     timeout: 200 * 1000,
-    reuseExistingServer: false
+    reuseExistingServer: true //This was originally disabled to prevent differences in local debugging vs. CI. However, it significantly speeds up local debugging.
   },
   maxFailures: MAX_FAILURES, //Limits failures to 5 to reduce CI Waste
   workers: NUM_WORKERS, //Limit to 2 for CircleCI Agent