A very simple way to specify interactions between two programming languages

[KuechA]

In case of incomplete code, it is possible that a function is declared in some language and then used in another programming language through some sort of interface between the languages (could be default e.g. for C/C++ or a language bridge mapping more things e.g. JNI). This is not really handled by the SymbolResolver and it would just infer new nodes if the language is not equal.

This PR suggests introducing a very basic model specifying such inter-language bridges.

Related to #2732

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
747	1	746	13

View the top 1 failed test(s) by shortest run time

de.fraunhofer.aisec.cpg.IntegrationTest::testForeignFunctionInterface()

Stack Traces | 2.59s run time

org.opentest4j.AssertionFailedError: Expected value to be true.
	at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:38)
	at app//org.junit.jupiter.api.Assertions.fail(Assertions.java:138)
	at app//kotlin.test.junit5.JUnit5Asserter.fail(JUnitSupport.kt:56)
	at app//kotlin.test.Asserter.assertTrue(Assertions.kt:765)
	at app//kotlin.test.junit5.JUnit5Asserter.assertTrue(JUnitSupport.kt:30)
	at app//kotlin.test.Asserter.assertTrue(Assertions.kt:775)
	at app//kotlin.test.junit5.JUnit5Asserter.assertTrue(JUnitSupport.kt:30)
	at app//kotlin.test.AssertionsKt__AssertionsKt.assertTrue(Assertions.kt:44)
	at app//kotlin.test.AssertionsKt.assertTrue(Unknown Source)
	at app//kotlin.test.AssertionsKt__AssertionsKt.assertTrue$default(Assertions.kt:42)
	at app//kotlin.test.AssertionsKt.assertTrue$default(Unknown Source)
	at app//de.fraunhofer.aisec.cpg.IntegrationTest.testForeignFunctionInterface(IntegrationTest.kt:105)
	at java.base@21.0.6/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base@21.0.6/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base@21.0.6/java.util.ArrayList.forEach(ArrayList.java:1596)

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[oxisto]

Ok this is complete overkill. The original idea is a great idea but what you are trying to achieve can be solved by a simple adjustment of the language check (see original issue)