[Gradle, JS] Add filter on file on fileCollectionDependencies because Gradle can't hash directory

^KT-43668 fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/resolver/KotlinCompilationNpmResolver.kt

@@ -339,7 +339,7 @@ internal class KotlinCompilationNpmResolver(
                 resolver.gradleNodeModules.get(it.dependency.moduleName, it.dependency.moduleVersion, it.artifact.file)
             } + fileCollectionDependencies.flatMap { dependency ->
                 dependency.files
-                    .filter { it.exists() }
+                    .filter { it.exists() && it.isFile }
                     .map { file ->
                         resolver.gradleNodeModules.get(
                             file.name,