### 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
"""Install a collection under a given path.
    :param collection: Collection to be installed.
    :param path: Collection dirs layout path.
    :param artifacts_manager: Artifacts manager.
    """
    b_artifact_path = artifacts_manager.get_artifact_path_from_unknown(collection)
    collection_path = os.path.join(path, collection.namespace, collection.name)
    b_collection_path = to_bytes(collection_path, errors='surrogate_or_strict')
    display.display(
        u"Installing '{coll!s}' to '{path!s}'".
        format(coll=to_text(collection), path=collection_path),
    )
    if os.path.exists(b_collection_path):
        shutil.rmtree(b_collection_path)
    if collection.is_dir:
        install_src(collection, b_artifact_path, b_collection_path, artifacts_manager)
    else:
        install_artifact(
            b_artifact_path,
            b_collection_path,
            artifacts_manager._b_working_directory,
            collection.signatures,
            artifacts_manager.keyring,
            artifacts_manager.required_successful_signature_count,
            artifacts_manager.ignore_signature_errors,