Fix unsupported data types in Astarte import

[osmanhadzic]

The current import functionality fails when encountering unsupported data types, which can lead to incomplete or incorrect imports. This fix ensures that unsupported data types are handled gracefully.

• Added checks for unsupported data types in the import process.
• Implemented error handling to log and skip unsupported data types instead of failing the entire import.

Testing

Manual testing has been conducted to ensure the import process completes successfully even when unsupported data types are encountered.

• [x] I have read CONTRIBUTING.md and CODE_OF_CONDUCT.md
• [x] I have added to CHANGELOG.md relevant changes and any other user facing change
• [x] I have added or ran the appropriate tests

What this PR does / why we need it:

This PR addresses an issue with the unsupported data types during the import process in Astarte.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

• [x] Yes
• [ ] No

Additional documentation e.g. usage docs, diagrams, etc.: