### 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
display.vvvv(f"GnuPG signature verification succeeded, verifying contents of {local_collection}")
    if verify_local_only:
        
        manifest_hash = get_hash_from_validation_source(MANIFEST_FILENAME)
    elif keyring_configured and remote_collection.signatures:
        manifest_hash = get_hash_from_validation_source(MANIFEST_FILENAME)
    else:
        
        
        b_temp_tar_path = artifacts_manager.get_artifact_path_from_unknown(remote_collection)
        display.vvv(
            u"Remote collection cached as '{path!s}'".format(path=to_text(b_temp_tar_path))
        )
        
        get_json_from_validation_source = functools.partial(_get_json_from_tar_file, b_temp_tar_path)
        get_hash_from_validation_source = functools.partial(_get_tar_file_hash, b_temp_tar_path)
        
        manifest_hash = get_hash_from_validation_source(MANIFEST_FILENAME)
        _verify_file_hash(b_collection_path, MANIFEST_FILENAME, manifest_hash, modified_content)
    display.display('MANIFEST.json hash: {manifest_hash}'.format(manifest_hash=manifest_hash))
    manifest = get_json_from_validation_source(MANIFEST_FILENAME)
    
    file_manifest_data = manifest['file_manifest_file']
    file_manifest_filename = file_manifest_data['name']
    expected_hash = file_manifest_data['chksum_%s' % file_manifest_data['chksum_type']]
    
    _verify_file_hash(b_collection_path, file_manifest_filename, expected_hash, modified_content)
    file_manifest = get_json_from_validation_source(file_manifest_filename)
    collection_dirs = set()
    collection_files = {