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/users/components/UserChip.tsx

@@ -1,7 +1,5 @@
 import { AvatarChip } from 'twenty-ui';
 
-import { getImageAbsoluteURIOrBase64 } from '~/utils/image/getImageAbsoluteURIOrBase64';
-
 export type UserChipProps = {
   id: string;
   name: string;
@@ -13,6 +11,6 @@ export const UserChip = ({ id, name, avatarUrl }: UserChipProps) => (
     placeholderColorSeed={id}
     name={name}
     avatarType="rounded"
-    avatarUrl={getImageAbsoluteURIOrBase64(avatarUrl) || ''}
+    avatarUrl={avatarUrl}
   />
 );