[JPS] Ignore classpath from facets to exclude jars from gradle build

Reimport after `./gradlew build` adds jars from gradle's `build/libs` to facet's classpath. That causes problems with JPS build, because it doesn't see changes in out folder, but see unchanged jar, so changes don't apply.

#KT-51873 Fixed

Merge-request: KT-MR-6018
Merged-by: Aleksei Cherepanov <aleksei.cherepanov@jetbrains.com>

jps/jps-plugin/testData/general/BuildAfterGdwBuild/module2/module2.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="jdk" jdkName="IDEA_JDK" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="module1" />
+  </component>
+</module>
+

jps/jps-plugin/testData/general/BuildAfterGdwBuild/module2/src/Derived.kt

@@ -0,0 +1,9 @@
+class Derived: Base() {
+    override fun doSmth() {
+        println("doSmth")
+    }
+
+    override fun doSmthElse() {
+        println("doSmthElse")
+    }
+}