ObjectStore parse_url Incorrectly Handles URLs with Spaces

[tustvold]

Describe the bug

ObjectStore::parse_url does not correctly decode URL paths, resulting in incorrect behaviour for paths containing spaces (or other non URL-safe characters).

To Reproduce

Expected behavior

#[test]
fn test_url_spaces() {
    let url = Url::parse("file:///my file with spaces").unwrap();
    assert_eq!(url.path(), "/my%20file%20with%20spaces");
    let (_, path) = parse_url(&url).unwrap();
    assert_eq!(path.as_ref(), "my file with spaces");
}

Additional context

Relates to apache/datafusion#8012 and apache/datafusion#7877

[tustvold]

label_issue.py automatically added labels {'object-store'} from #5018