Apply SERVICE optimization for OPTIONAL and MINUS

[UNEXENU]

With this commit, the optimization that constrains a SERVICE query using a VALUES clause when the sibling of the SERVICE is small (originally introduced in #1341) is also applied for OPTIONAL and MINUS clauses when the right operand is a SERVICE.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.17%. Comparing base (d5315d2) to head (d2c2ffd).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1502 +/- ## ========================================== + Coverage 94.14% 94.17% +0.02% ========================================== Files 347 347 Lines 25641 25654 +13 Branches 3450 3452 +2 ========================================== + Hits 24141 24159 +18 + Misses 1458 1453 -5 Partials 42 42 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud