This commit provides a cron job to migrate attachment binary to the
cloud storage. The cron job is designed to be manually triggered from
by the "Run Manually" button of the Scheduled Action's form view.

The cron job will try to upload some attachments once
    1. size is greater than the minimum upload file size defined by
       (ir.config_parameter: cloud_storage_min_file_size)
    2. id is greater than the number defined by
       (ir.config_parameter: cloud_storage_migration_min_attachment_id)
    3. res_model is in a white list
       (ir.config_parameter: cloud_storage_migration_message_models)
       (ir.config_parameter: cloud_storage_migration_all_models)
    4. not used by documents.document
 
optional configurations to avoid timeout issues
- cloud_storage_migration_max_file_size:
  max bytes for each migrated attachment
- cloud_storage_migration_max_batch_file_size:
  max total bytes for migrated attachments in one cron job execution

The cloud_storage_migration_min_attachment_id which can be accessed
from the list view can be treated as the progress of the cron job.
Manually setting it to 0 and retriggering the cron job will retry the
upload process for previously failed or ignored attachments.

taskid: 5387110


Steps

1. install a cloud storage module (cloud_storage_google, cloud_storage_azure)
2. install the cloud storage migration module (cloud_storage_migration)
3. Go to Settings for Cloud Storage Settings <img width="505" height="206" alt="image" src="https://github.com/user-attachments/assets/d72d7b52-5ce7-4209-8645-4a8ac35dd049" />
4. [Configure the cloud storage settings](https://www.odoo.com/documentation/19.0/applications/general/integrations/cloud_storage.html)
5. Setting the Minimum File Size. Attachments smaller than the size won't be uploaded to the cloud storage <img width="457" height="96" alt="image" src="https://github.com/user-attachments/assets/8dc4e6fe-9c84-44f5-a83a-28c7b2fad30a" />
6. After 4, configure settings for the cloud storage migration 
&nbsp;&nbsp; a. <img width="464" height="209" alt="image" src="https://github.com/user-attachments/assets/37352453-ff0e-4e03-a4d5-7fdb8168dee1" />

&nbsp;&nbsp; b. Cron Job:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i. the link to the cloud storage migration cron job
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ii. the cron job is designed to be a job only triggered by clicking "Run Manually".
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; iii. It will re-trigger itself until all relevant attachments are migrated.

&nbsp;&nbsp; c. Parameters:
<img width="882" height="571" alt="image" src="https://github.com/user-attachments/assets/9926ed9f-81ac-4917-b759-872ed2584217" />

&nbsp;&nbsp; d. Progress Bar:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i.progress of the migration job
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ii. calculated by `cloud_storage_migration_min_attachment_id / cloud_storage_migration_max_attachment_id`

&nbsp;&nbsp; e. Attachment Report:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i. <img width="1907" height="298" alt="image" src="https://github.com/user-attachments/assets/33a77835-c6b6-4bc4-b20a-4ec68acba783" />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ii. a view to help administrator analyze which model's attachments should be migrated

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; iii. help to configure step 6.c.i.4 and step 6.c.i.5

&nbsp;&nbsp; f. Message Attachments
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i. help to configure step 6.c.i.4

&nbsp;&nbsp; g.All attachments
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i. help to configure step 6.c.i.5


7. Click Cron Job and then Click Run Manually 
<img width="409" height="123" alt="image" src="https://github.com/user-attachments/assets/f60cdfcf-e6a6-4503-87fc-0be7f14ceede" />




Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:




---
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Forward-Port-Of: odoo/odoo#238928
Forward-Port-Of: odoo/odoo#235745

This improvement enhances user control over cookie preferences by making
the Cookie Policy page (/cookie-policy) more accessible and allowing
users to modify their consent at any time.

**Issue:**

- Previously, the only way to access the Cookie Policy page was through
  the link in the cookie consent popup. However, once users accepted
  cookies, the popup was no longer displayed, making it impossible to
  navigate to the policy page later.

- Additionally, the Cookie Policy page had a button to reopen the cookie
  consent popup, but it was only visible if cookies were not accepted.
  Once cookies were accepted, the button was hidden, preventing users
  from changing their preferences.

**Improvements:**

- Added a permanent link to the Cookie Policy page in the copyright
  footer, ensuring it remains accessible at all times.

- The cookie consent toggle button now remains visible even after a user
  has accepted cookies, allowing them to update their preferences at any
  time.

task-[4502416](https://www.odoo.com/odoo/project/974/tasks/4502416)

Forward-Port-Of: odoo/odoo#238772
Forward-Port-Of: odoo/odoo#203409