Snowflake: Add CREATE FILE FORMAT Support (#3104)

* Add CreateFileFormatSegment, CSV Format Type Options

* Swapping to AnyNumberOf()

* Add other file formats, complete create file format

* Move TYPE to Parameters, Add tests, Remove old class

* Big refactor, create tests

* Resolve merge conflicts fully

* Update Regex and String Parsers

* test fixtures

* Remove commented out code

* Remove artefact, ugh

* Update src/sqlfluff/dialects/dialect_snowflake.py

Co-authored-by: Barry Pollard <barry_pollard@hotmail.com>

* Remove raw string

* Generate yml fixtures

Co-authored-by: Barry Pollard <barry_pollard@hotmail.com>