Remove deprecated `ActiveRecord::Fixtures.find_table_name` in favour of `ActiveRecord::Fixtures.default_fixture_model_name`.
Merge pull request #11264 from vipulnsward/deprecate_find_table_name

Remove deprecated `ActiveRecord::Fixtures.find_table_name`
Remove deprecated `Time#time_with_datetime_fallback`, `Time#utc_time`
    and `Time#local_time` in favour of `Time#utc` and `Time#local`
Merge pull request #11265 from vipulnsward/deprecated_time_methods

Remove deprecated `Time` methods
Correctly handle relations as values in where() for polymorphic associations.