* Updated to support Teradata, Oracle and others

* How to handle strings and encodings

* Updated String Processing

* Fixed existing tests for Postgres, Oracle

* Fixed teradata validation issue

* Added Fixed Char and Variable Char tables

* Updated to mostly remove trim_string_pks - test_config_manager failing

* Updated cli_tools.py

* Updated to use Neil's suggestion regarding storing raw data types in config manager

* Created fixed_char and varchar tests, fixed unit tests

* Updated documentation to remove tsp

* Updated different clients add is_char_type_padded function

* Updated line count on yaml files; The property trim_string_pks was removed, resulting in one fewer line output; No harm in reading that property from old yaml files, it is no longer used

* updated to migrate backend specific stuff to backends

* Updated to fix unit tests

* Updated Internal Design doc

* Removed table definitions in sql files

* Added warning if yaml files still have the trim string primary keys flag turned on

* Made changes for Random Row and Partition Builder

* Renamed function to is_padded_char

* Updated to use is_padded_char rather than _is_padded_char

* feat: Add PaddedCharLength rule for backends with is_char_type_padded method

* Linted

* Linted

* Linted

* Updated documentation

* docs: Update product names in strings.md

* Fixed tests on mysql, postgres, teradata

* Fixed Random rows Oracle, queries and tables will have padded primary keys stripped

* Updating Typing to fix errors

* Linted

* Updated tests for clarity

---------

Co-authored-by: Helen Cristina <helensilva14@gmail.com>
Co-authored-by: Neil Johnson <neiljohnson@google.com>