Coordinate token refresh

[shawkins]

There is no synchronization between concurrent requests - each will attempt to authorize. The regular TokenRefreshInterceptor has the same behavior. This will be more nuanced to address as ideally we don't want to block the other threads.

Originally posted by @shawkins in #4673 (comment)

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!