Add missing sonar-java-symbolic-execution repository (#5156)

The symbolic execution engine for Java has been migrated to its own repository.
The coverage information for Java SE rules should also be looked up in this new repository.

Author: dorian-burihabwa-sonarsource

rspec-tools/rspec_tools/coverage.py

@@ -23,6 +23,7 @@
     "sonar-html",
     "sonar-iac-enterprise",
     "sonar-java",
+    "sonar-java-symbolic-execution",
     "SonarJS",
     "sonar-kotlin",
     "sonar-php",