Fix React hydration issues (#32958)

* Add more playwright axe tests to settings dialogs

* Add utility to jest setupTests to detect React hydration errors

* Iterate jest utility

* Fix axe issue heading-order

* Fix div-in-p issues

* Fix setupTests.ts

* Fix heading order

* Make types happier

* Fix hydration issues of thead containing text nodes

* Update tests

* Fix form-in-form React hydration issues

* Fix li-in-li React hydration issues

* Fix checked in form without onChange React hydration issue

* Fix styling bleeding from _common.pcss

* Update snapshots

* Fix more remaining issues

* Remove _common.pcss h2 rule altogether

* Fix test

* Update snapshots

* Iterate

* Iterate

* Update snapshots

* Simplify diff

* Test

* Update screenshots

* Update screenshot

apps/web/test/unit-tests/components/views/messages/__snapshots__/TextualBody-test.tsx.snap

@@ -59,7 +59,7 @@ exports[`<TextualBody /> renders formatted m.text correctly linkification is not
         </code>
       </div>
     </pre>
-    <div
+    <button
       aria-label="Copy"
       class="mx_AccessibleButton mx_EventTile_button mx_EventTile_copyButton"
       role="button"
@@ -79,7 +79,7 @@ exports[`<TextualBody /> renders formatted m.text correctly linkification is not
           d="M8 10a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2h-9a2 2 0 0 1-2-2zm2 0v9h9v-9z"
         />
       </svg>
-    </div>
+    </button>
   </div>
   
 
@@ -278,7 +278,7 @@ exports[`<TextualBody /> renders formatted m.text correctly pills do not appear
         </code>
       </div>
     </pre>
-    <div
+    <button
       aria-label="Copy"
       class="mx_AccessibleButton mx_EventTile_button mx_EventTile_copyButton"
       role="button"
@@ -298,7 +298,7 @@ exports[`<TextualBody /> renders formatted m.text correctly pills do not appear
           d="M8 10a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2h-9a2 2 0 0 1-2-2zm2 0v9h9v-9z"
         />
       </svg>
-    </div>
+    </button>
   </div>
   
 
@@ -482,7 +482,7 @@ num_sqrt = num **
         />
       </svg>
     </span>
-    <div
+    <button
       aria-label="Copy"
       class="mx_AccessibleButton mx_EventTile_button mx_EventTile_copyButton mx_EventTile_buttonBottom"
       role="button"
@@ -502,7 +502,7 @@ num_sqrt = num **
           d="M8 10a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2h-9a2 2 0 0 1-2-2zm2 0v9h9v-9z"
         />
       </svg>
-    </div>
+    </button>
   </div>