Installer config import does not run the config import storage transformation pipeline

Problem/Motivation

When an install profile imports configuration during installation, StorageComparer is built directly from the raw config.storage.sync FileStorage and never passes through the config.import_transformer service. As a result, subscribers to the config import transformation event (ConfigTransformStorageEvent / StorageTransformEvent) do not run during installation (even though they run for a normal drush config:import / config import via the UI). As a result, for example, config_exclude_module is not honoured during installation.

Steps to reproduce

1. Create an install profile that installs from synced configuration, excluding a module that differs between the committed config and the install environment (e.g. the database driver module).
2. Install the profile in an environment whose active driver differs committed config (e.g. install on SQLite while config/sync tracksMySQL).
3. Installation fails: the config import tries to uninstall the live

Proposed resolution

Transform the sync storage through the config.import_transformer service in both install-time import paths, so install-time config import runs the same storage transformers as a normal configuration import.

Release notes snippet

Run the config import storage transform pipeline during install-time config import, so config_ignore / config_exclude_modules are honoured at install just like drush config:import.