<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Use case is for customers on air-gapped customers who want to take the tarball using a flash drive inside their network.
Currently that is not possible because cli does not keep the tarball after installing the collection.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ansible-galaxy cli

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can also paste gist.github.com links for larger files -->

rel_path = to_text(b_rel_path, errors='surrogate_or_strict')
            if os.path.isdir(b_abs_path):
                if any(b_item == b_path for b_path in b_ignore_dirs) or \
                        any(fnmatch.fnmatch(b_rel_path, b_pattern) for b_pattern in b_ignore_patterns):
                    display.vvv("Skipping '%s' for collection build" % to_text(b_abs_path))
                    continue
                if os.path.islink(b_abs_path):
                    b_link_target = os.path.realpath(b_abs_path)
                    if not b_link_target.startswith(b_top_level_dir):
                        display.warning("Skipping '%s' as it is a symbolic link to a directory outside the collection"
                                        % to_text(b_abs_path))
                        continue
                manifest_entry = entry_template.copy()
                manifest_entry['name'] = rel_path
                manifest_entry['ftype'] = 'dir'
                manifest['files'].append(manifest_entry)
                _walk(b_abs_path, b_top_level_dir)
            else:
                if any(fnmatch.fnmatch(b_rel_path, b_pattern) for b_pattern in b_ignore_patterns):
                    display.vvv("Skipping '%s' for collection build" % to_text(b_abs_path))
                    continue
                manifest_entry = entry_template.copy()
                manifest_entry['name'] = rel_path
                manifest_entry['ftype'] = 'file'
                manifest_entry['chksum_type'] = 'sha256'
                manifest_entry['chksum_sha256'] = secure_hash(b_abs_path, hash_func=sha256)
                manifest['files'].append(manifest_entry)
    _walk(b_collection_path, b_collection_path)
    return manifest
def _build_manifest(namespace, name, version, authors, readme, tags, description, license_ids, license_file,