Deprecate ROPC flow

[Ugonnaak1]

Deprecation of ROPC API due to MFA enforcement phase 2 approaching
AB#3303464

[trwalke]

All of the tests using the ROPC flow will need to be migrated right? the doc says that ESTS may not issue a token
Microsoft Entra will either not issue the token, or the resource will reject the request.
Once that happens all of these will fail

[Ugonnaak1]

All of the tests using the ROPC flow will need to be migrated right? the doc says that ESTS may not issue a token Microsoft Entra will either not issue the token, or the resource will reject the request. Once that happens all of these will fail

@bgavrilMS Would it be better to just disable the tests that use the ROPC flow?

[scottaddie]

@Ugonnaak1 Can you please open a docs PR to update the following lines?

https://github.com/MicrosoftDocs/entra-docs-pr/blob/18f98f53acda97fc5840eb46c655b47e3d217096/docs/identity/authentication/concept-mandatory-multifactor-authentication.md#L73-L74

We want that list to reflect product truth in MSAL.NET. It should also indicate the version in which the API deprecations happened.

[gladjohn]

we normally do not use please. suggest removing it.