Add ansible-builder build endpoint

[jerabekjiri]

Issue: AAH-2762

• add unit tests
• add integration tests
• nginx unlock size limit on podman push >413 Request Entity Too Large

Tested on example execution_environment.yml with newswangerd.main_collection collection:

---
version: 3
images:
  base_image:
    name: quay.io/centos/centos:stream8 
    
options:
  user: '1000' 

dependencies:
  python_interpreter:
    package_system: python39 
    python_path: /usr/bin/python3.9
  ansible_core:  
    package_pip: https://github.com/ansible/ansible/archive/refs/tags/v2.13.2.tar.gz   # install from a GH ref tarball
  ansible_runner:  
    package_pip: ansible-runner==2.2.1

  galaxy:
    collections:
    - newswangerd.main_collection

How to run builder endpoint:

1. galaxykit -s http://localhost:5001/api/galaxy/ collection upload foo bar (or just upload any collection to system)
2. get pulp_href of repository that the collection is in (/api/galaxy/v3/plugin/ansible/search/collection-versions/?namespace=foo&name=bar > repository > pulp_href)

curl -X POST \ 
-H 'Content-Type: application/json' \
-u admin:admin \
-d '{
    "destination_container_repository": "new_ee_image", \
    "container_tag": "1.0.0", \
    "source_collection_repositories": "<repository.pulp_href>" \
    "execution_environment_yaml": "<execution_environment.yml>"
    }' \
http://localhost:5001/api/galaxy/v3/plugin/execution-environments/image-builder/

repository.pulp_href: paste from step 2
execution_environment: paste the example execution_environment.yml posted above