Allow empty task id and osm id for new geopoint

[Sujanadh]

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

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

Related Issue

• Issue Use create_if in XLSForm 'entities' tab to create a new Entity on geopoint upload #1730
• Issue Submission count in infographics page is not updated when custom coordinate upload #1711
  For newly created entity of geopoint of feature , there won't be task_id and osm_id in entity properties resulted into validation error.

Describe this PR

This PR now allows the empty task_id and osm_id for new entity created when user locate new geopoint for a feature in field. It is dependent to osm-fieldwork where xls file is updated to allow to create new entity for the gps point of new feature recorded.

Screenshots

N/A

Alternative Approaches Considered

Did you attempt any other approaches that are not documented in code?

Review Guide

• Use the xlsx form updated in osm-fieldwork
• create submission recording geopoint for new feature
• check the entity status and submission count

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.

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

[Sujanadh]

ps: this PR doesn't affect existing feature

[Sujanadh]

Updates:

• decided to populate task_id through form using save_to method.

[spwoodcock]

An easier way to write this is with .get on a python dict 👍

if flattened_dict.get("task_id", "") == "":