[PLACEHOLDER] Improve Async Pathways in Connectivity APIs

### Is your feature request related to a problem? Please describe.
This is a placeholder issue, more details will be added over time.

SqlConnection.OpenAsync() violates async best practices in numerous locations. This issue will track those locations and how they should be fixed.

- connection resiliency reconnect uses Task.Run. Introduce a sync api.
internal Task ValidateAndReconnect(Action beforeDisconnect, int timeout)
runningReconnect = Task.Run(() => ReconnectAsync(timeout));
- SqlInternalConnectionTds.cs - fedauth token acquisition
- _fedAuthToken = new(Task.Run(async () => await authProvider!.AcquireTokenAsync(authParamsBuilder)).GetAwaiter().GetResult());

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### Additional context
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[AB#42261](https://sqlclientdrivers.visualstudio.com/b49eac2d-45b3-4951-899d-b8637b46f89a/_workitems/edit/42261)