Fix SSPI button visibility when SSPI is the only enabled method (#32841)

Author: JulianRedgrave

templates/user/auth/signin_inner.tmpl

@@ -48,7 +48,7 @@
 			</div>
 		</form>
 		{{end}}{{/*if .EnablePasswordSignInForm*/}}
-		{{$showOAuth2Methods := or .OAuth2Providers .EnableOpenIDSignIn}}
+		{{$showOAuth2Methods := or .OAuth2Providers .EnableOpenIDSignIn .EnableSSPI}}
 		{{if and $showOAuth2Methods .EnablePasswordSignInForm}}
 			<div class="divider divider-text">{{ctx.Locale.Tr "sign_in_or"}}</div>
 		{{end}}

templates/user/auth/signup_inner.tmpl

@@ -47,7 +47,7 @@
 					</button>
 				</div>
 			{{end}}
-			{{$showOAuth2Methods := or .OAuth2Providers .EnableOpenIDSignIn}}
+			{{$showOAuth2Methods := or .OAuth2Providers .EnableOpenIDSignIn .EnableSSPI}}
 			{{if $showOAuth2Methods}}
 				<div class="divider divider-text">{{ctx.Locale.Tr "sign_in_or"}}</div>
 				{{template "user/auth/oauth_container" .}}