dump.to_sql should detect schema changes

[OriHoch]

reproduction steps

• use dump.to_sql with a field defined as date
• when dump.to_sql is run it will create the table and defined the column as a date type in the sql engine
• modify the code, now the field is defined as string
• re-run the pipeline

expected

• dump.to_sql should fail and warn that the schema changed and now the descriptor schema doesn't match the sql schema

actual

• dump.to_sql tries to update the field (assuming it's in the correct type) and fails, showing a hard to debug error message

notes

• the jsontableschema_sql library has a method that returns the descriptor from an sql table - if it works it should provide the needed functionality