Updated Java binding related dependencies.

[tucek]

Updated KDBException to only access error key at construction time.

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[tucek]

for some unclear reasons the build containers cannot access the maven dependency...

* What went wrong:
Execution failed for task ':libelektra-kotlin:compileKotlin'.
> Could not resolve all files for configuration ':libelektra-kotlin:kotlinCompilerPluginClasspathMain'.
   > Could not find org.jetbrains.kotlin:kotlin-scripting-jvm:1.8.20.
     Searched in the following locations:
       - https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-scripting-jvm/1.8.20/kotlin-scripting-jvm-1.8.20.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project :libelektra-kotlin > org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable:1.8.20 > org.jetbrains.kotlin:kotlin-scripting-compiler-impl-embeddable:1.8.20