### 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
except LookupError as lookup_err:
        raise AnsibleError(to_native(lookup_err)) from lookup_err
    collection_manifest = _build_manifest(**collection_meta)
    file_manifest = _build_files_manifest(
        b_collection_path,
        collection_meta['namespace'],  
        collection_meta['name'],  
        collection_meta['build_ignore'],  
        collection_meta['manifest'],  
        collection_meta['license_file'],  
    )
    artifact_tarball_file_name = '{ns!s}-{name!s}-{ver!s}.tar.gz'.format(
        name=collection_meta['name'],
        ns=collection_meta['namespace'],
        ver=collection_meta['version'],
    )
    b_collection_output = os.path.join(
        to_bytes(u_output_path),
        to_bytes(artifact_tarball_file_name, errors='surrogate_or_strict'),
    )
    if os.path.exists(b_collection_output):
        if os.path.isdir(b_collection_output):
            raise AnsibleError("The output collection artifact '%s' already exists, "
                               "but is a directory - aborting" % to_native(b_collection_output))
        elif not force:
            raise AnsibleError("The file '%s' already exists. You can use --force to re-create "
                               "the collection artifact." % to_native(b_collection_output))
    collection_output = _build_collection_tar(b_collection_path, b_collection_output, collection_manifest, file_manifest)
    return collection_output
def download_collections(