[skip ci] Fix coverage job in nightly

We get the following errors:

profiling:./ext/pdo_oci/.libs/oci_statement.gcda:Cannot open
...

It seems these extensions were never tested for coverage. Having coverage here
would be nice, but since they are not actively worked on I don't want to
investigate the issue.

Author: iluuu1994

.github/workflows/nightly.yml

@@ -303,8 +303,6 @@ jobs:
         uses: actions/checkout@v3
       - name: Create MSSQL container
         uses: ./.github/actions/setup-mssql
-      - name: Create Oracle container
-        uses: ./.github/actions/setup-oracle
       - name: apt
         uses: ./.github/actions/apt-x64
       - name: Install gcovr