Deprecate ROPC flow (#584)

* deprecate ROPC flow

* updates

* address comments

* reenable tests and remoce cca flow deprecation

* fix

* edit

* add period

Author: Ugonnaak1

apps/public/public.go

@@ -368,9 +368,9 @@ type AcquireByUsernamePasswordOption interface {
 	acquireByUsernamePasswordOption()
 }
 
-// AcquireTokenByUsernamePassword acquires a security token from the authority, via Username/Password Authentication.
-// NOTE: this flow is NOT recommended.
+// Deprecated: This API will be removed in a future release. Use a more secure flow instead. Follow this migration guide: https://aka.ms/msal-ropc-migration
 //
+// AcquireTokenByUsernamePassword acquires a security token from the authority, via Username/Password Authentication.
 // Options: [WithClaims], [WithTenantID]
 func (pca Client) AcquireTokenByUsernamePassword(ctx context.Context, scopes []string, username, password string, opts ...AcquireByUsernamePasswordOption) (AuthResult, error) {
 	o := acquireTokenByUsernamePasswordOptions{}