Ensure task_id field is always included with submissions

[spwoodcock]

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

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation
• 🧑‍💻 Refactor
• ✅ Test
• 🤖 Build or CI
• ❓ Other (please specify)

Related Issue

Related to #1581

Describe this PR

• The task_id field was not mandatory on the XLSForms, but was required for the submission table filtering in FMTM.
• I updated osm-fieldwork XLSForms to have a mandatory task_id field, that is calculated from the Entity task_id.
• The existing task_id field was renamed to task_filter and is only used to filter features by the task area in ODK Collect (field ignored if a feature is already selected).

Review Guide

• Easiest to test on dev / staging, or using cloudflare tunnels: just --unstable start tunnel.
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Checklist before requesting a review

• 📖 Read the FMTM Contributing Guide: https://github.com/hotosm/fmtm/blob/main/CONTRIBUTING.md
• 📖 Read the HOT Code of Conduct: https://docs.hotosm.org/code-of-conduct
• 👷‍♀️ 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.

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[spwoodcock]

Fixes the submission_table endpoint and submission table in the frontend
@Sujanadh @manjitapandey