Sc 18208 Ensure Excel conversion to CSV includes all data

[rad-pat]

Converting from Excel to CSV was skipping a line of data in the case that NO HEADER was used.
This ensures we always read all data rows after figuring out the header. The result of the conversion ALWAYS has a header row.

[github-actions]

File	Coverage
All files	38%	❌
plaidcloud/utilities/analyze_table.py	36%	❌
plaidcloud/utilities/bom.py	24%	❌
plaidcloud/utilities/clean_files.py	28%	❌
plaidcloud/utilities/connect.py	35%	❌
plaidcloud/utilities/convert_encoding.py	31%	❌
plaidcloud/utilities/data_helpers.py	26%	❌
plaidcloud/utilities/frame_manager.py	19%	❌
plaidcloud/utilities/pretty_size.py	91%	✅
plaidcloud/utilities/query.py	21%	❌
plaidcloud/utilities/sql_expression.py	85%	✅
plaidcloud/utilities/sqlalchemy_functions.py	62%	❌
plaidcloud/utilities/sqlalchemy_views.py	92%	✅
plaidcloud/utilities/stringtransforms.py	76%	✅
plaidcloud/utilities/udf.py	16%	❌
plaidcloud/utilities/utility.py	19%	❌
plaidcloud/utilities/xray.py	88%	✅
plaidcloud/utilities/remote/dim_helpers.py	10%	❌
plaidcloud/utilities/remote/dimension.py	32%	❌

Minimum allowed coverage is 75%

Generated by 🐒 cobertura-action against cc29d05