Refactoring: vaccination

src/flask_covid19/blueprints/data_owid/owid_views.py

...emplates/owid/continent/all/owid_continent_all_table.html

..._who/templates/who/country/one/who_country_one_table.html

...templates/who/country/one/who_country_one_table_head.html

...ts/data_who/templates/who/data/who_table_global_data.html

...es/who/date_reported/one/who_date_reported_one_table.html

...lueprints/data_who/templates/who/flat/who_flat_table.html

...s/data_who/templates/who/imported/who_imported_table.html

...ta_who/templates/who/region/all/who_region_all_table.html