minor: avoid reparsing WB v1 download_urls
minor: avoid reparsing WB v1 download_urls

 * In the OSF provider if self.url is a WB v1 url, save it as the
   download url to avoid reparsing each time.

TomBaxter/modular-file-renderer,rdhyee/modular-file-renderer,felliott/modular-file-renderer,CenterForOpenScience/modular-file-renderer,Johnetordoff/modular-file-renderer,felliott/modular-file-renderer,CenterForOpenScience/modular-file-renderer,rdhyee/modular-file-renderer,CenterForOpenScience/modular-file-renderer,TomBaxter/modular-file-renderer,rdhyee/modular-file-renderer,AddisonSchiller/modular-file-renderer,Johnetordoff/modular-file-renderer,rdhyee/modular-file-renderer,felliott/modular-file-renderer,Johnetordoff/modular-file-renderer,TomBaxter/modular-file-renderer,TomBaxter/modular-file-renderer,AddisonSchiller/modular-file-renderer,AddisonSchiller/modular-file-renderer,Johnetordoff/modular-file-renderer,CenterForOpenScience/modular-file-renderer,AddisonSchiller/modular-file-renderer,felliott/modular-file-renderer