feat(csv-file-validations): Csv File Validations in CsvToDatabseConfiguration

[SamraHanifCareem]

SUMMARY
Adding CSV File Validations such as:

• Max File Size
• Rows to Read

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

• Configure the following keys in config.py according to the requirements:

  1. CSV_MAX_SIZES 
     

  2. CSV_MAX_ROWS 
     

  3. CSV_MIN_ROWS
     

• Route to Databases Screen
• Upload CSV File

ADDITIONAL INFORMATION

• Has associated issue:
• Required config changes : CSV_MAX_SIZES, CSV_MAX_ROWS, CSV_MIN_ROWS
• Changes UI
• Includes DB Migration (follow approval process in [SIP-59] Proposal for Database migration standards apache/superset#13351)
• Migration is atomic, supports rollback & is backwards-compatible
• Confirm DB migration upgrade and downgrade tested
• Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API