### 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
default_err = 'Collection %s is not installed in any of the collection paths.' % collection.fqcn
                for search_path in search_paths:
                    b_search_path = to_bytes(
                        os.path.join(
                            search_path,
                            collection.namespace, collection.name,
                        ),
                        errors='surrogate_or_strict',
                    )
                    if not os.path.isdir(b_search_path):
                        continue
                    if not _is_installed_collection_dir(b_search_path):
                        default_err = (
                            "Collection %s does not have a MANIFEST.json. "
                            "A MANIFEST.json is expected if the collection has been built "
                            "and installed via ansible-galaxy" % collection.fqcn
                        )
                        continue
                    local_collection = Candidate.from_dir_path(
                        b_search_path, artifacts_manager,
                    )
                    supplemental_signatures = [
                        get_signature_from_source(source, display)
                        for source in collection.signature_sources or []
                    ]
                    local_collection = Candidate(
                        local_collection.fqcn,
                        local_collection.ver,
                        local_collection.src,