Restore skip for Oracle 9.2 test on 18c+ databases

The skip line from c057935 was dropped during the merge.

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

Author: yahonda

spec/plsql/procedure_spec.rb

@@ -1521,6 +1521,7 @@ def new_candidate(status)
       end
 
       it "should create temporary tables when using Oracle 9.2" do
+        skip "Skip if the actual database version is 18c or higher" if (plsql.connection.database_version <=> [18, 0, 0, 0]) >= 0
         expect(plsql(:oracle_9).test_collections.test_numbers(@numbers)).to eq([@numbers, { x_numbers: @numbers }])
       end