Remove minimal_install(), ship with default configuration instead

Problem/Motivation

minimal_install() updates two configuration files as part of the installation. This is not necessary. The ConfigInstaller will prefer config in the profile's config/install directory.

In #2788777: Allow a site-specific profile to be installed from existing config we're trying to allow sites to be completely installed from configuration. Whilst module's implementations of hook_install() have to be compatible with being installed via the ConfigImporter at the moment there is no requirement for install profile's implementations to be because they will always be installed prior to running an import.

Proposed resolution

• Remove minimal_install()
• Create necessary config files in minimal/config/install
• Add tests to ensure configuration is correct

Remaining tasks

User interface changes

None

API changes

None - a hook implementation is not API.

Data model changes

None