Deprecate OAuth2 login redirect-uri-template

This property is deprecated in favor of
`spring.security.oauth2.client.registration.login.*.redirect-uri

Closes gh-14226

spring-boot-samples/spring-boot-sample-oauth2-client/src/main/resources/application.yml

@@ -10,14 +10,14 @@ spring:
               client-name: Github user
               provider: github
               scope: user
-              redirect-uri-template: http://localhost:8080/login/oauth2/code/github
+              redirect-uri: http://localhost:8080/login/oauth2/code/github
             github-client-2:
               client-id: ${APP-CLIENT-ID}
               client-secret: ${APP-CLIENT-SECRET}
               client-name: Github email
               provider: github
               scope: user:email
-              redirect-uri-template: http://localhost:8080/login/oauth2/code/github
+              redirect-uri: http://localhost:8080/login/oauth2/code/github
             yahoo-oidc:
               client-id: a
               client-secret: b