Update utils.py - replace/force-create import_mode were not being handled

[sidphbot]

code snippet to reproduce:
doltcli
write_rows(write_rows(dolt, "characters", TEST_ROWS, REPLACE, ["id"])

or via doltpy:
write_pandas(dolt, table_name, df, import_mode='replace')

both call _import_helper which refers to

doltcli/doltcli/utils.py

Lines 251 to 265 in a807c93

	def _get_import_mode_and_flags(
	dolt: DoltT, table: str, import_mode: Optional[str] = None
	) -> str:
	import_modes = IMPORT_MODES_TO_FLAGS.keys()
	if import_mode and import_mode not in import_modes:
	raise ValueError(f"update_mode must be one of: {import_modes}")
	else:
	if table in [table.name for table in dolt.ls()]:
	logger.info(f'No import mode specified, table exists, using "{UPDATE}"')
	import_mode = UPDATE
	else:
	logger.info(f'No import mode specified, table exists, using "{CREATE}"')
	import_mode = CREATE
	return import_mode

the checks force it to return only create/update mode depending on existence of table, replace/force-create modes are ignored

[codecov-commenter]

Codecov Report

Merging #32 (a807c93) into main (a807c93) will not change coverage.
The diff coverage is n/a.

❗ Current head a807c93 differs from pull request most recent head 059a7c6. Consider uploading reports for the commit 059a7c6 to get more accurate results

@@           Coverage Diff           @@
##             main      #32   +/-   ##
=======================================
  Coverage   66.04%   66.04%           
=======================================
  Files           5        5           
  Lines         972      972           
=======================================
  Hits          642      642           
  Misses        330      330           

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