Uatg

- update click version

- documentation.
- feature to use index.yaml for test selection.
- update instruction constants.
- add custom minimal trap handler for illegal insts and misaligned access.
- add feature to generate multiple tests from one plugin.
- update test_list generation for compile macros and march.
- Fix generate_asm return types for rvtest_data, name_postfix and signature.

- add support for updated chromite's config YAMLs
- update documentation for the new changes

- update readthedocs link

- update links to chromite_uatg_tests

- initial release of the UATG framework.