collection support: use manifest instead of excludes

The default for galaxy. `manifest` works well enough for our case, and
this avoids maintaining a blacklist.

galaxy.yml

@@ -9,42 +9,12 @@ authors:
 tags:
   - infrastructure
 repository: https://github.com/kubernetes-sigs/kubespray
+issues: https://github.com/kubernetes-sigs/kubespray/issues
+documentation: https://kubespray.io
 license_file: LICENSE
 dependencies:
   ansible.utils: '>=2.5.0'
   community.general: '>=3.0.0'
-build_ignore:
-  - .github
-  - '*.tar.gz'
-  - extra_playbooks
-  - inventory
-  - scripts
-  - test-infra
-  - .ansible-lint
-  - .editorconfig
-  - .gitignore
-  - .gitlab-ci
-  - .gitlab-ci.yml
-  - .gitmodules
-  - .markdownlint.yaml
-  - .nojekyll
-  - .pre-commit-config.yaml
-  - .yamllint
-  - Dockerfile
-  - FILES.json
-  - MANIFEST.json
-  - Makefile
-  - Vagrantfile
-  - _config.yml
-  - ansible.cfg
-  - requirements*txt
-  - setup.cfg
-  - setup.py
-  - index.html
-  - reset.yml
-  - cluster.yml
-  - scale.yml
-  - recover-control-plane.yml
-  - remove-node.yml
-  - upgrade-cluster.yml
-  - library
+manifest:
+  directives:
+    - recursive-exclude tests **