Clenup testing suite

[kasium]

SQLAlchemy

• [x] computed_columns
• [x] computed_columns_stored
• [x] computed_columns_virtual
• [x] regexp_match
• [x] regexp_replace
• [x] precision_numerics_general
• [x] precision_numerics_enotation_small
• [x] precision_numerics_many_significant_digits
• [x] precision_numerics_retains_significant_digits
• [x] infinity_floats
• [x] float_or_double_precision_behaves_generically
• [x] emulated_lastrowid
• [x] dbapi_lastrowid
• [x] ctes
• [x] ctes_on_dml
• [x] ctes_with_update_delete
• [x] implicit_default_schema

Alembic

• [x] compute_*

Additional

• [x] enable disabled tests
• [x] Copy the whole requirement file and set what we need