Resolve "Remove support for MySQL"

.gitlab-ci.yml

ReleaseNotes.md

catalogue/AllCatalogueSchema.hpp

catalogue/CMakeLists.txt

catalogue/CatalogueFactoryFactory.cpp

catalogue/CreateAllSchemasCppFile.sh

catalogue/CreateSchemaCmd.cpp

catalogue/DatabaseMetadataGetter.cpp

catalogue/DatabaseMetadataGetter.hpp

catalogue/MysqlCatalogue.cpp

catalogue/MysqlCatalogue.hpp

catalogue/MysqlCatalogueFactory.cpp

catalogue/MysqlCatalogueFactory.hpp

catalogue/MysqlCatalogueSchema.before_SQL.cpp

catalogue/MysqlCatalogueSchema.hpp

catalogue/PostgresCatalogue.cpp

catalogue/README.md

catalogue/SchemaChecker.cpp

catalogue/SchemaComparer.cpp

catalogue/SchemaSqlStatementsReader.cpp