Start switching to MSSQL_SA_PASSWORD repo secret

Author: roji

.github/workflows/copilot-setup-steps.yml

@@ -47,11 +47,9 @@ jobs:
         run: ./restore.sh
 
       - name: Export SQL Server connection string for the agent's session
-        run: echo "Test__SqlServer__DefaultConnection=Server=localhost;Database=master;User=SA;Password=P@ssw0rd12345!;Connect Timeout=60;ConnectRetryCount=0;Trust Server Certificate=true" >> "$GITHUB_ENV"
+        run: echo "Test__SqlServer__DefaultConnection=Server=localhost;Database=master;User=SA;Password=${{ secrets.MSSQL_SA_PASSWORD }};Connect Timeout=60;ConnectRetryCount=0;Trust Server Certificate=true" >> "$GITHUB_ENV"
 
       - name: Run tests (temporary)
-        # env:
-        #   TEST__SQLSERVER__DEFAULTCONNECTION: Server=localhost;Database=master;User=SA;Password=P@ssw0rd12345!;Connect Timeout=60;ConnectRetryCount=0;Trust Server Certificate=true
         run: |
           ./activate.sh
           dotnet test test/EFCore.SqlServer.FunctionalTests --filter Microsoft.EntityFrameworkCore.Query.Translations.GuidTranslationsSqlServerTest