Improve performance of demo workspace - Rename getImageAbsoluteURIOrBase64 function (#6282)

### Description

1. This PR is a continuation of a previous PR:
https://github.com/twentyhq/twenty/pull/6201#pullrequestreview-2175601222

2. One test case was removed here:
`packages/twenty-front/src/utils/image/__tests__/getImageAbsoluteURI.test.ts`
because since we are not handling base64 images anymore, the result is
the same of the last test case. Would you rather we update the test
instead?


### Refs

- #3514
- https://github.com/twentyhq/twenty/pull/6201

### Demo


https://www.loom.com/share/4f32b535c77a4d418e319b095d09452c?sid=df34adf8-b013-44ef-b794-d54846f52d2d

Fixes #3514

---------

Co-authored-by: gitstart-twenty <gitstart-twenty@users.noreply.github.com>

packages/twenty-front/src/modules/favorites/components/Favorites.tsx

@@ -10,7 +10,6 @@ import { NavigationDrawerItem } from '@/ui/navigation/navigation-drawer/componen
 import { NavigationDrawerSection } from '@/ui/navigation/navigation-drawer/components/NavigationDrawerSection';
 import { NavigationDrawerSectionTitle } from '@/ui/navigation/navigation-drawer/components/NavigationDrawerSectionTitle';
 import { useNavigationSection } from '@/ui/navigation/navigation-drawer/hooks/useNavigationSection';
-import { getImageAbsoluteURIOrBase64 } from '~/utils/image/getImageAbsoluteURIOrBase64';
 
 import { useFavorites } from '../hooks/useFavorites';
 
@@ -81,7 +80,7 @@ export const Favorites = () => {
                         Icon={() => (
                           <StyledAvatar
                             placeholderColorSeed={recordId}
-                            avatarUrl={getImageAbsoluteURIOrBase64(avatarUrl)}
+                            avatarUrl={avatarUrl}
                             type={avatarType}
                             placeholder={labelIdentifier}
                             className="fav-avatar"