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/activities/components/ParticipantChip.tsx

@@ -4,7 +4,6 @@ import { Avatar } from 'twenty-ui';
 import { getDisplayNameFromParticipant } from '@/activities/emails/utils/getDisplayNameFromParticipant';
 import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
 import { RecordChip } from '@/object-record/components/RecordChip';
-import { getImageAbsoluteURIOrBase64 } from '~/utils/image/getImageAbsoluteURIOrBase64';
 
 const StyledAvatar = styled(Avatar)`
   margin-right: ${({ theme }) => theme.spacing(1)};
@@ -74,7 +73,7 @@ export const ParticipantChip = ({
       ) : (
         <StyledChip>
           <StyledAvatar
-            avatarUrl={getImageAbsoluteURIOrBase64(avatarUrl)}
+            avatarUrl={avatarUrl}
             type="rounded"
             placeholder={displayName}
             size="sm"