Reduce API calls on home page and project details page

[spwoodcock]

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore (Release)
• ⏩ Revert

Describe this PR

• The home page was calling two endpoints to get project summaries and project centroids.
  • Updated the project summaries model to include project centroids.
• The project detail page was calling three endpoints on load to get project details, task details, task centroids.
  • The task details were already returned under project.tasks key, so I removed the call to /tasks/task-list.
  • The centroids are also returned within the task details .outline_centroid key.
  • I'm not entirely sure what the get_point_on_surface endpoint was for, I think it just returned centroids. I marked it for deletion.

Now both the homepage load and project details load take one API call.

Checklist before requesting a review

• 📖 Read the FMTM Contributing Guide: https://github.com/hotosm/fmtm/blob/main/CONTRIBUTING.md
• 📖 Read the FMTM Code of Conduct: https://github.com/hotosm/fmtm/blob/main/CODE_OF_CONDUCT.md
• 👷‍♀️ Create small PRs. In most cases, this will be possible.
• ✅ Provide tests for your changes.
• 📝 Use descriptive commit messages.
• 📗 Update any related documentation and include any relevant screenshots.

[optional] What gif best describes this PR or how it makes you feel?