Bugfix/ErrorEvent with unknown sourceid

[lanarimarco]

Description

Fix Issue

When a syntax error occurred after the /API directive, the ErrorEvent.sourceReference.sourceId was UNKNOWN.

Regression due to #573.

The reason for this regression is that the loading and usage of the API must follow a well-defined pattern, which the author of the fix in #573 could not know. This pattern was implemented only in the CompilationUnit.includeApi function. To avoid misuse of API, I have added the new ApiId.loadAndUse function, which ensures the safe loading and usage of the API.

Refactor Test Functions

In the context of this implementation, these useful test functions:

• executePgmCallBackTest
• executeSourceLineTest

were moved from JarikoCallbackTest to AbstractTest. Consequently, two test units, written specifically for Smeup, were moved from JarikoCallbackTest to SmeupInterpreterTest.

In addition, I have added a validation in both functions where if ErrorEvent.sourceReference.sourceId is UNKNOWN, an error is thrown.

Overall, this implementation improves the handling of RPG programs with the /API directive.

Checklist:

• There are tests regarding this feature
• The code follows the Kotlin conventions (run ./gradlew ktlintCheck)
• The code passes all tests (run ./gradlew check)
• There is specific documentation in the docs directory