[skip ci] Re-enable nightly redis build (GH-16118)

* Re-enable nightly redis build (that should pass again)
* Disable Xdebug for now (it currently fails already during configure for PHP >= 8.5.0)

Author: cmb69

.github/workflows/nightly.yml

@@ -873,13 +873,12 @@ jobs:
           repository: php-memcached-dev/php-memcached
           path: memcached
       - name: git checkout redis
-        # Currently fails to build
-        if: false
         uses: actions/checkout@v4
         with:
           repository: phpredis/phpredis
           path: redis
       - name: git checkout xdebug
+        if: false
         uses: actions/checkout@v4
         with:
           repository: xdebug/xdebug
@@ -935,14 +934,13 @@ jobs:
           ./configure --prefix=/opt/php --with-php-config=/opt/php/bin/php-config
           make -j$(/usr/bin/nproc)
       - name: build redis
-        # Currently fails to build
-        if: false
         run: |
           cd redis
           /opt/php/bin/phpize
           ./configure --prefix=/opt/php --with-php-config=/opt/php/bin/php-config
           make -j$(/usr/bin/nproc)
       - name: build xdebug
+        if: false
         run: |
           cd xdebug
           /opt/php/bin/phpize