Avoid downloading Oracle JDBC driver where unused

The `wget ojdbc17.jar` step had become a hard dependency on Oracle's
download endpoint for matrix entries that never load the jar:

- `test.yml` and `test_11g.yml`: gate the download with
  `if: startsWith(matrix.ruby, 'jruby')` so MRI rubies skip it.
- `test_gemfiles.yml`: drop the step entirely; the matrix is
  MRI-only.

Also add `jruby-10.0.5.0` (with Oracle JDK 21 via
`actions/setup-java`) to the `test_11g.yml` matrix so the download
that remains is exercised against Oracle 11g XE.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

.github/workflows/test.yml

@@ -68,6 +68,7 @@ jobs:
         sudo unzip -qo instantclient-sqlplus-linux.x64-23.26.1.0.0.zip -d /opt/oracle/
         echo "/opt/oracle/instantclient_23_26" >> $GITHUB_PATH
     - name: Install JDBC Driver
+      if: startsWith(matrix.ruby, 'jruby')
       run: |
         wget -q https://download.oracle.com/otn-pub/otn_software/jdbc/23261/ojdbc17.jar -O ./lib/ojdbc17.jar
     - name: Create database user

.github/workflows/test_11g.yml

@@ -19,7 +19,8 @@ jobs:
           '4.0',
           '3.4',
           '3.3',
-          '3.2'
+          '3.2',
+          'jruby-10.0.5.0',
         ]
     env:
       ORACLE_HOME: /opt/oracle/instantclient_21_15
@@ -46,6 +47,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v6
+    - name: Set up Java
+      if: startsWith(matrix.ruby, 'jruby')
+      uses: actions/setup-java@v4
+      with:
+        distribution: oracle
+        java-version: '21'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
@@ -66,6 +73,7 @@ jobs:
         sudo unzip -qo instantclient-sdk-linux.x64-21.15.0.0.0dbru.zip -d /opt/oracle
         echo "/opt/oracle/instantclient_21_15" >> $GITHUB_PATH
     - name: Install JDBC Driver
+      if: startsWith(matrix.ruby, 'jruby')
       run: |
         wget -q https://download.oracle.com/otn-pub/otn_software/jdbc/23261/ojdbc17.jar -O ./lib/ojdbc17.jar
     - name: Configure ORA_TZFILE to match Oracle 11g server

.github/workflows/test_gemfiles.yml

@@ -82,9 +82,6 @@ jobs:
         sudo unzip -qo instantclient-sdk-linux.x64-23.26.1.0.0.zip -d /opt/oracle/
         sudo unzip -qo instantclient-sqlplus-linux.x64-23.26.1.0.0.zip -d /opt/oracle/
         echo "/opt/oracle/instantclient_23_26" >> $GITHUB_PATH
-    - name: Install JDBC Driver
-      run: |
-        wget -q https://download.oracle.com/otn-pub/otn_software/jdbc/23261/ojdbc17.jar -O ./lib/ojdbc17.jar
     - name: Create database user
       run: |
         ./ci/setup_accounts.sh