refactor: convert git datasources to class-based (#10531)

lib/datasource/api.ts

lib/datasource/git-refs/base.ts

lib/datasource/git-refs/index.spec.ts

lib/datasource/git-refs/index.ts

lib/datasource/git-tags/index.spec.ts

lib/datasource/git-tags/index.ts

lib/manager/ansible-galaxy/collections.ts

lib/manager/ansible-galaxy/roles.ts

lib/manager/argocd/extract.ts

lib/manager/azure-pipelines/extract.ts

lib/manager/batect/extract.spec.ts

lib/manager/batect/extract.ts

lib/manager/cocoapods/extract.ts

lib/manager/composer/extract.ts

lib/manager/git-submodules/extract.ts

lib/manager/kustomize/extract.spec.ts

lib/manager/kustomize/extract.ts

lib/manager/swift/extract.ts

lib/manager/terraform/modules.ts

lib/manager/terragrunt/modules.ts