Devenv: Update to keycloak 20 (#61174)

update to keycloak 20

devenv/docker/blocks/auth/jwt_proxy/docker-compose.yaml

@@ -10,16 +10,16 @@
     restart: unless-stopped
 
   oauthkeycloak:
-    image: quay.io/keycloak/keycloak:12.0.1
+    image: quay.io/keycloak/keycloak:20.0
     container_name: oauthkeycloak
+    command: --spi-login-protocol-openid-connect-legacy-logout-redirect-uri=true start-dev
     environment:
-      DB_VENDOR: POSTGRES
-      DB_ADDR: oauthkeycloakdb
-      DB_DATABASE: keycloak
-      DB_USER: keycloak
-      DB_PASSWORD: password
-      KEYCLOAK_USER: admin
-      KEYCLOAK_PASSWORD: admin
+      KC_DB: postgres
+      KC_DB_URL: jdbc:postgresql://oauthkeycloakdb/keycloak
+      KC_DB_USERNAME: keycloak
+      KC_DB_PASSWORD: password
+      KEYCLOAK_ADMIN: admin
+      KEYCLOAK_ADMIN_PASSWORD: admin
       PROXY_ADDRESS_FORWARDING: "true"
     ports:
       - 8087:8080
@@ -38,10 +38,10 @@
       "--provider=keycloak",
       "--client-id=grafana-oauth",
       "--client-secret=d17b9ea9-bcb1-43d2-b132-d339e55872a8",
-      "--login-url=http://env.grafana.local:8087/auth/realms/grafana/protocol/openid-connect/auth",
-      "--redeem-url=http://env.grafana.local:8087/auth/realms/grafana/protocol/openid-connect/token",
-      "--profile-url=http://env.grafana.local:8087/auth/realms/grafana/protocol/openid-connect/userinfo",
-      "--validate-url=http://env.grafana.local:8087/auth/realms/grafana/protocol/openid-connect/userinfo",
+      "--login-url=http://env.grafana.local:8087/realms/grafana/protocol/openid-connect/auth",
+      "--redeem-url=http://env.grafana.local:8087/realms/grafana/protocol/openid-connect/token",
+      "--profile-url=http://env.grafana.local:8087/realms/grafana/protocol/openid-connect/userinfo",
+      "--validate-url=http://env.grafana.local:8087/realms/grafana/protocol/openid-connect/userinfo",
       "--cookie-secure=false",
       "--http-address=0.0.0.0:8088",
       "--redirect-url=http://env.grafana.local:8088/oauth2/callback",