### Summary

I'm trying to optimise my builds by avoiding unnecessary downloads.
ansible-galaxy install always downloads the latest version even if the existing collection already meets the requirements. This behaviour appears to be consistent with the documentation (https://docs.ansible.com/ansible/latest/galaxy/user_guide.html#installing-an-older-version-of-a-collection), but why has it been implemented to always download ?


e.g. I have
```
# /usr/local/lib/python3.8/site-packages/ansible_collections
Collection                    Version
----------------------------- -------
amazon.aws                    3.5.0  
...
```
and requirements.yml
```
---
collections:
  - name: amazon.aws
    version: '>=1.5.0'
```
if I run ansible-galaxy install -r requirements.yml I get amazon.aws 6.1.0 installed, even though 3.5.0 already meets my 1.5.0 requirement. I would expect nothing to happen because my requirements were already met.

### Issue Type

Feature Idea

### Component Name

ansible galaxy

### Additional Information

People who like the existing behaviour could perhaps use the recently added --upgrade switch to continue to get the upgrade to the lastest version.

### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
mock_subprocess_check_call = MagicMock()
    monkeypatch.setattr(collection.concrete_artifact_manager.subprocess, 'check_call', mock_subprocess_check_call)
    mock_mkdtemp = MagicMock(return_value='')
    monkeypatch.setattr(collection.concrete_artifact_manager, 'mkdtemp', mock_mkdtemp)
    collection.concrete_artifact_manager._extract_collection_from_git(url, version, b'path')
    assert mock_subprocess_check_call.call_count == 2
    repo = 'https://github.com/org/repo'
    if trailing_slash:
        repo += '/'
    git_executable = get_bin_path('git')
    shallow_clone_cmd = (git_executable, 'clone', '--depth=1', repo, '')
    assert mock_subprocess_check_call.call_args_list[0].args[0] == shallow_clone_cmd
    assert mock_subprocess_check_call.call_args_list[1].args[0] == (git_executable, 'checkout', 'HEAD')
def test_build_requirement_from_path(collection_artifact):
    tmp_path = os.path.join(os.path.split(collection_artifact[1])[0], b'temp')
    concrete_artifact_cm = collection.concrete_artifact_manager.ConcreteArtifactsManager(tmp_path, validate_certs=False)
    actual = Requirement.from_dir_path_as_unknown(collection_artifact[0], concrete_artifact_cm)
    assert actual.namespace == u'ansible_namespace'
    assert actual.name == u'collection'
    assert actual.src == collection_artifact[0]
    assert actual.ver == u'0.1.0'
@pytest.mark.parametrize('version', ['1.1.1', '1.1.0', '1.0.0'])
def test_build_requirement_from_path_with_manifest(version, collection_artifact):