refactor(terraform-module): convert to class-based (#10486)

lib/datasource/api.ts

lib/datasource/terraform-module/base.ts

lib/datasource/terraform-module/index.spec.ts

lib/datasource/terraform-module/index.ts

lib/datasource/terraform-provider/index.ts

lib/manager/terraform/modules.ts

lib/manager/terragrunt/modules.ts