[BUGFIX] Replace legacy bootstrap classes supported by FontAwesome

FontAwesome provides CSS classes that align with the old Bootstrap v3
classes, which will cause troubles with the removal of FontAwesome.
As another preparation task, those classes are be replaced with the
according Bootstrap classes.

Classes replaced:

* pull-left -> float-start
* pull-right -> float-end
* sr-only -> visually-hidden

Resolves: #98064
Resolves: #94531
Releases: main, 11.5
Change-Id: I4e96572e6b3a0007a7bf68f3018934f73da6249b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75344
Tested-by: core-ci <[email protected]>
Tested-by: Oliver Bartsch <[email protected]>
Tested-by: Stefan Kapitza <[email protected]>
Tested-by: Andreas Fernandez <[email protected]>
Reviewed-by: Oliver Bartsch <[email protected]>
Reviewed-by: Georg Ringer <[email protected]>
Reviewed-by: Stefan Kapitza <[email protected]>
Reviewed-by: Andreas Fernandez <[email protected]>

Classes/Controller/SetupModuleController.php

@@ -473,7 +473,7 @@ class="form-check-input"
                                 ' width="' . (int)$avatarImage->getWidth() . '" ' .
                                 'height="' . (int)$avatarImage->getHeight() . '" />' .
                                 '</span></span>';
-                            $html .= '<span class="pull-left" style="padding-right: 10px" id="image_' . htmlspecialchars($fieldName) . '">' . $icon . ' </span>';
+                            $html .= '<span class="float-start" style="padding-right: 10px" id="image_' . htmlspecialchars($fieldName) . '">' . $icon . ' </span>';
                         }
                     }
                     $html .= '<input id="field_' . htmlspecialchars($fieldName) . '" type="hidden" ' .