Add build_folder parameter in basic_layout

[ErniGH]

Changelog: Feature: Add build_folder parameter in basic_layout Docs: https://github.com/conan-io/docs/pull/XXXX

close: https://github.com/conan-io/conan/issues/17315

The basic_layout does not have a parameter to change the destination folder of the build. It is always forced to be ./build-"build_type". This parameter would allow not only renaming the destination folder but also, by changing the full path, it would enable compiling outside of the source folder.