[K/N][perf] Fix kotlin language version in kotlin-dsl plugin for performance subproject

kotlin-native/performance/buildSrc/build.gradle.kts

@@ -133,3 +133,12 @@ gradlePlugin {
         }
     }
 }
+
+afterEvaluate {
+    tasks.withType<KotlinCompile>().configureEach {
+        kotlinOptions {
+            languageVersion = "1.4"
+            apiVersion = "1.4"
+        }
+    }
+}

kotlin-native/tools/benchmarksAnalyzer/buildSrc/build.gradle.kts

@@ -106,3 +106,12 @@ dependencies {
     implementation("com.github.jengelman.gradle.plugins:shadow:$shadowVersion")
     implementation("org.jetbrains.kotlinx:kotlinx-metadata-klib:$metadataVersion")
 }
+
+afterEvaluate {
+    tasks.withType<KotlinCompile>().configureEach {
+        kotlinOptions {
+            languageVersion = "1.4"
+            apiVersion = "1.4"
+        }
+    }
+}