Remove -Werror for libmysql test on 8.1 only

Author: iluuu1994

.github/workflows/nightly.yml

@@ -822,7 +822,6 @@ jobs:
       - name: Build mysql-8.0
         uses: ./.github/actions/build-libmysqlclient
         with:
-          configurationParameters: --enable-werror
           libmysql: mysql-8.0.37-linux-glibc2.28-x86_64.tar.xz
           withMysqli: ${{ matrix.branch.ref == 'PHP-8.1' }}
       - name: Test mysql-8.0
@@ -832,7 +831,6 @@ jobs:
       - name: Build mysql-8.4
         uses: ./.github/actions/build-libmysqlclient
         with:
-          configurationParameters: --enable-werror
           libmysql: mysql-8.4.0-linux-glibc2.28-x86_64.tar.xz
           withMysqli: ${{ matrix.branch.ref == 'PHP-8.1' }}
       - name: Test mysql-8.4