GetSchema button should override the output schema in File source plugins
The schema detection functionality is not usable since it does not override output schema
Steps to reproduce:
a. Open File source in studio
b. Add file path for avro file
c. Click on get Schema
The schema is not refreshed.
Also, if the output schema is edited, the getSchema functionality does not update.
Only after clearing the output schema the schema detection is working
This causes a bad user experience and makes it seem like the functionality is not working.