[Bug]: JsonSchema fails with JSON round-trip #5264

Description of the problem/issue

JsonSchema type field is asymmetric since there is a custom serializer that does not have a matching deserializer. This leads to a JSON round-trip failing when a single type is set.

Affected Version

2.2.53

Steps to Reproduce

1. Create an instance of JsonSchema where there is a single type defined
2. Serialize it
3. Deserialize it, and see that it fails with reading type: X into types

Expected Behavior

Deserialization should work.

Actual Behavior

Deserialization does not work.

Logs / Stack Traces

Additional Context

Checklist

• I have searched the existing issues and this is not a duplicate.
• I have provided sufficient information for maintainers to reproduce the issue.