HCK-14858: Custom scripts in ALTER statements

[AlikRakhmonov]

HCK-14858 [Oracle]: Update ALTER script generation to return array of fragments

1. AlterDtoScript contains a single statement now (scripts => script).
2. Update all locations where getInstance is used so it accepts a single string of a single statement.
3. Remove redundant cycles (.map()).
4. Add the keepDtos flag to return object statements or a string for backward compatibility.
5. Extend AlterDtoScript with the scriptType and entityId properties that will be used by custom script hooks.
   Currently, entityId is added only to the newly created items.

[sonarqubecloud]

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 SonarQube Cloud