Adding bulk load for Spark (DataBricks)

[anthonysena]

Aims to address #300 by adding support for bulk loading data into DataBricks.

For reference: https://learn.microsoft.com/en-us/azure/databricks/ingestion/cloud-object-storage/copy-into/tutorial-dbsql

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 60 lines in your changes missing coverage. Please review.

Project coverage is 57.83%. Comparing base (ff12112) to head (25fd106).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
R/BulkLoad.R	0.00%	58 Missing ⚠️
R/InsertTable.R	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #301      +/-   ##
===========================================
- Coverage    59.04%   57.83%   -1.21%     
===========================================
  Files           15       15              
  Lines         2881     2941      +60     
===========================================
  Hits          1701     1701              
- Misses        1180     1240      +60     

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