Update CI: upgrade actions/setup-go to v5, remove etcd service

Signed-off-by: Aishwarya2001A <aaishwar@progress.com>

Author: Aishwarya2001A

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
 
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v5
         with:
           go-version: 1.24.3
 
@@ -68,7 +68,6 @@ jobs:
           DEX_POSTGRES_PASSWORD: postgres
           DEX_POSTGRES_HOST: localhost
           DEX_POSTGRES_PORT: ${{ job.services.postgres.ports[5432] }}
-          DEX_ETCD_ENDPOINTS: http://localhost:${{ job.services.etcd.ports[2379] }}
           DEX_LDAP_TESTS: 0
           DEX_KEYSTONE_URL: http://localhost:${{ job.services.keystone.ports[5000] }}
           DEX_KEYSTONE_ADMIN_URL: http://localhost:${{ job.services.keystone.ports[35357] }}