##### SUMMARY
When installing a collection, all files are created with mode 0600. This is caused by the way the collection .tar.gz file is extracted: https://github.com/ansible/ansible/blob/d3ec31f8d5683926aa6a05bb573d9929a6266fac/lib/ansible/galaxy/collection.py#L1076-L1090 The file created by `tempfile.NamedTemporaryFile()` seems to have mode `0600` and is simply moved to the final destination without a following `os.chmod`.

(See also this discussion: https://github.com/ansible-collections/community.general/pull/29#discussion_r396147440)

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
lib/ansible/galaxy/collection.py

##### ANSIBLE VERSION
```
2.9
2.10
```

meta_info = get_collections_galaxy_meta_info()
    mandatory_keys = set()
    string_keys = set()
    list_keys = set()
    dict_keys = set()
    for info in meta_info:
        if info.get('required', False):
            mandatory_keys.add(info['key'])
        key_list_type = {
            'str': string_keys,
            'list': list_keys,
            'dict': dict_keys,
        }[info.get('type', 'str')]
        key_list_type.add(info['key'])
    all_keys = frozenset(list(mandatory_keys) + list(string_keys) + list(list_keys) + list(dict_keys))
    try:
        with open(b_galaxy_yml_path, 'rb') as g_yaml:
            galaxy_yml = yaml.safe_load(g_yaml)
    except YAMLError as err:
        raise AnsibleError("Failed to parse the galaxy.yml at '%s' with the following error:\n%s"
                           % (to_native(b_galaxy_yml_path), to_native(err)))
    set_keys = set(galaxy_yml.keys())
    missing_keys = mandatory_keys.difference(set_keys)