[Task]: Add tooltip to expiration and timelock icons

[nicole-obrien]

Task description

We need to add a tooltip to the expiration and timelock icons in activity tile to describe what they are to end user

Requirements

• [ ] Add tooltip to icons
• [ ] Add tooltip icons to the activity tile

Creation checklist

• [ ] I have assigned this task to the correct people
• [X] I have added the most appropriate labels
• [X] I have linked the correct milestone and/or project