* Enable low precision types for ConvertLike operation
* Migrate backend unit test suite to template plugin reference tests
* Fix typo in naming convention
* Avoid duplication of template plugin tests execution
* Add file to instantiate TEST_P and avoid test execution duplication
* minor changes in Op class and add ref impl for acosh
* acosh in new test framework
* add Acosh type test
* add SLT for Acosh
* run more test
* new acosh plugin test
* add visitor test
* fix test utils
* add template test for all supported types in Acosh
* add builder to template tests
* update grn template_plugin test
* update maste to feature branch