The Microsoft identity platform supports the device authorization grant:

https://learn.microsoft.com/en-us/entra/identity-platform/v2-oauth2-device-code

This PR adds the "https://login.microsoftonline.com/{tenant}/oauth2/v2.0/devicecode" DeviceAuthURL to the AzureADEndpoint.

Fixes #700

Change-Id: I8ca571391e0e0f4d383e3f2f07a66b26edcb4679
GitHub-Last-Rev: 2b953c3
GitHub-Pull-Request: #701
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/564315
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Matt Hickford <matt.hickford@gmail.com>
Run-TryBot: Matt Hickford <matt.hickford@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

Related #615
Related googleapis/google-cloud-go#9545

Change-Id: I762dc53c61204ec5103336dab6358b9b4d1337d4
GitHub-Last-Rev: 439c393
GitHub-Pull-Request: #719
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/579495
Reviewed-by: Cody Oss <codyoss@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cody Oss <codyoss@google.com>
Reviewed-by: Jordan Liggitt <liggitt@google.com>

Change-Id: Ifc12ed36671d21e388c537c510a82be084e9ec99
GitHub-Last-Rev: a4da759
GitHub-Pull-Request: #720
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/580715
TryBot-Bypass: Cody Oss <codyoss@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
Reviewed-by: Joedian Reid <joedian@google.com>

The shortest MDS token cache time is 4 minutes. The refresh window is updated
to 3 minutes and 45 seconds to give the MDS time to update it's cache.

This should make slow refreshes less likely to cause failures.

Done in googleapis/google-cloud-go#9139 for the other auth library.

Change-Id: Ifa353248197d8998e6b0363d1f2821b45a0e6495
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/584815
Auto-Submit: Cody Oss <codyoss@google.com>
TryBot-Bypass: Cody Oss <codyoss@google.com>
Run-TryBot: Cody Oss <codyoss@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cody Oss <codyoss@google.com>