Treat classpath extraction problems on script definition loading as warnings

#KT-44206 fixed

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDefinitionsManager.kt

@@ -56,6 +56,7 @@ import kotlin.script.experimental.host.configurationDependencies
 import kotlin.script.experimental.host.toScriptSource
 import kotlin.script.experimental.jvm.JvmDependency
 import kotlin.script.experimental.jvm.defaultJvmScriptingHostConfiguration
+import kotlin.script.experimental.jvm.util.ClasspathExtractionException
 import kotlin.script.experimental.jvm.util.scriptCompilationClasspathFromContextOrStdlib
 import kotlin.script.templates.standard.ScriptTemplateWithArgs
 
@@ -252,8 +253,14 @@ class ScriptDefinitionsManager(private val project: Project) : LazyScriptDefinit
         } catch (t: Throwable) {
             if (t is ControlFlowException) throw t
             // reporting failed loading only once
-            scriptingErrorLog("[kts] cannot load script definitions using $this", t)
             failedContributorsHashes.add(this@safeGetDefinitions.hashCode())
+            // Assuming that direct ClasspathExtractionException is the result of versions mismatch and missing subsystems, e.g. kotlin plugin
+            // so, it only results in warning, while other errors are severe misconfigurations, resulting it user-visible error
+            if (t.cause is ClasspathExtractionException || t is ClasspathExtractionException) {
+                scriptingWarnLog("Cannot load script definitions from $this: ${t.cause?.message ?: t.message}")
+            } else {
+                scriptingErrorLog("[kts] cannot load script definitions using $this", t)
+            }
         }
         return emptyList()
     }

libraries/scripting/jvm/src/kotlin/script/experimental/jvm/util/jvmClasspathUtil.kt

@@ -54,6 +54,8 @@ internal const val KOTLIN_SCRIPT_RUNTIME_JAR_PROPERTY = "kotlin.script.runtime.j
 private val validClasspathFilesExtensions = setOf("jar", "zip", "java")
 private val validJarCollectionFilesExtensions = setOf("jar", "war", "zip")
 
+class ClasspathExtractionException(message: String) : Exception(message)
+
 fun classpathFromClassloader(currentClassLoader: ClassLoader, unpackJarCollections: Boolean = false): List<File>? {
     val processedJars = hashSetOf<File>()
     val unpackJarCollectionsDir by lazy {
@@ -299,7 +301,7 @@ fun scriptCompilationClasspathFromContext(
         wholeClasspath = wholeClasspath,
         unpackJarCollections = unpackJarCollections
     )
-        ?: throw Exception("Unable to get script compilation classpath from context, please specify explicit classpath via \"$KOTLIN_SCRIPT_CLASSPATH_PROPERTY\" property")
+        ?: throw ClasspathExtractionException("Unable to get script compilation classpath from context, please specify explicit classpath via \"$KOTLIN_SCRIPT_CLASSPATH_PROPERTY\" property")
 
 object KotlinJars {