fix: Fix issue with profile picture not updating (#10532)

This PR resolves the issue with updating the profile picture in the profile settings.

**Cause of issue**
The issue can be reproduced with the old `ProfileAvatar.vue` component.
While the exact reason is unclear, it seems related to cases where the
file might be `null`.

**Solution**
Replaced the old `ProfileAvatar.vue` with `Avatar.vue` and tested it. It
works fine. I’ve attached a loom video below.

Fixes https://linear.app/chatwoot/issue/CW-3768/profile-picture-bug

Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

spec/controllers/api/v1/profiles_controller_spec.rb

@@ -180,6 +180,8 @@ RSpec.describe 'Profile API', type: :request do
                as: :json
 
         expect(response).to have_http_status(:success)
+        json_response = response.parsed_body
+        expect(json_response['avatar_url']).to be_empty
       end
     end
   end