Add SHOW_INITIAL_ROWS parameter to STREAM resource

[Anatoli-deBRADKE]

Is your feature request related to a problem? Please describe.

At the moment it is not possible to change the value of optional parameter SHOW_INITIAL_ROWS of a snowflake stream resource.

SHOW_INITIAL_ROWS, a boolean parameter, specifies whether to return all existing rows in the source table as row inserts the first time the stream is consumed. The next time the stream is consumed and thereafter, the stream only returns the DML changes to the source table since the most recent offset. This parameter enables initializing any downstream process with the contents of the source table for the stream.

Unfortunately, this parameter has a default value equal to FALSE, and we don't have the possibility to set it to TRUE using the terraform resource.

Describe the solution you'd like

Add the optional boolean parameter SHOW_INITIAL_ROWS to the snowflake_stream resource.

Additional context

Snowflake Stream doc: https://docs.snowflake.com/en/sql-reference/sql/create-stream.html