refactor: rename config admin functions to global

lib/config/admin.ts

lib/config/decrypt.spec.ts

lib/config/decrypt.ts

lib/config/migration.spec.ts

lib/config/migration.ts

lib/config/presets/npm/index.spec.ts

lib/config/types.ts

lib/datasource/crate/index.spec.ts

lib/datasource/crate/index.ts

lib/datasource/npm/index.spec.ts

lib/datasource/npm/npmrc.spec.ts

lib/datasource/npm/npmrc.ts

lib/manager/batect/extract.spec.ts

lib/manager/bundler/artifacts.spec.ts

lib/manager/cargo/artifacts.spec.ts

lib/manager/cargo/extract.spec.ts

lib/manager/cocoapods/artifacts.spec.ts

lib/manager/cocoapods/extract.spec.ts

lib/manager/composer/artifacts.spec.ts

lib/manager/composer/artifacts.ts