Declare system properties reads to be compatible w/ configuration cache

Gradle reports direct system properties reads as configuration cache problems as system properties are potential build configuration inputs.
See https://docs.gradle.org/7.0/userguide/configuration_cache.html for more details

Author: ALikhachev

plugin/main/src/kotlinx/benchmark/gradle/BenchmarksPlugin.kt

@@ -58,7 +58,7 @@ class BenchmarksPlugin : Plugin<Project> {
                 task<DefaultTask>(it.prefixName(RUN_BENCHMARKS_TASKNAME)) {
                     group = BENCHMARKS_TASK_GROUP
                     description = "Execute all benchmarks in a project"
-                    extensions.extraProperties.set("idea.internal.test", System.getProperty("idea.active"))
+                    extensions.extraProperties.set("idea.internal.test", getSystemProperty("idea.active"))
 
                     // Force all benchmarks runner to first build all benchmarks to ensure it won't spend time
                     // running some benchmarks when other will fail to compile

plugin/main/src/kotlinx/benchmark/gradle/JsNodeTasks.kt

@@ -17,7 +17,7 @@ fun Project.createJsBenchmarkExecTask(
 
         group = BenchmarksPlugin.BENCHMARKS_TASK_GROUP
         description = "Executes benchmark for '${target.name}'"
-        extensions.extraProperties.set("idea.internal.test", System.getProperty("idea.active"))
+        extensions.extraProperties.set("idea.internal.test", project.getSystemProperty("idea.active"))
 
         val reportsDir = benchmarkReportsDir(config, target)
         val reportFile = reportsDir.resolve("${target.name}.${config.reportFileExt()}")

plugin/main/src/kotlinx/benchmark/gradle/JvmTasks.kt

@@ -95,7 +95,7 @@ fun Project.createJvmBenchmarkExecTask(
     ) {
         group = BenchmarksPlugin.BENCHMARKS_TASK_GROUP
         description = "Execute benchmark for '${target.name}'"
-        extensions.extraProperties.set("idea.internal.test", System.getProperty("idea.active"))
+        extensions.extraProperties.set("idea.internal.test", project.getSystemProperty("idea.active"))
 
         val benchmarkBuildDir = benchmarkBuildDir(target)
         val reportsDir = benchmarkReportsDir(config, target)

plugin/main/src/kotlinx/benchmark/gradle/NativeMultiplatformTasks.kt

@@ -106,7 +106,7 @@ fun Project.createNativeBenchmarkExecTask(
     ) {
         group = BenchmarksPlugin.BENCHMARKS_TASK_GROUP
         description = "Executes benchmark for '${target.name}'"
-        extensions.extraProperties.set("idea.internal.test", System.getProperty("idea.active"))
+        extensions.extraProperties.set("idea.internal.test", project.getSystemProperty("idea.active"))
 
         val binary =
             benchmarkCompilation.target.binaries.getExecutable(benchmarkCompilation.name, NativeBuildType.RELEASE)

plugin/main/src/kotlinx/benchmark/gradle/Utils.kt

@@ -1,11 +1,15 @@
 package kotlinx.benchmark.gradle
 
-import groovy.lang.*
-import org.gradle.api.*
-import org.gradle.api.tasks.*
-import java.io.*
-import java.time.*
-import java.time.format.*
+import groovy.lang.Closure
+import org.gradle.api.Action
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.invocation.Gradle
+import org.gradle.api.tasks.TaskProvider
+import org.gradle.util.GradleVersion
+import java.io.File
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
 
 fun cleanup(file: File) {
     if (file.exists()) {
@@ -115,3 +119,20 @@ private fun validateConfig(config: BenchmarkConfiguration) {
     }
 
 }
+
+internal val Gradle.isConfigurationCacheAvailable
+    get() = try {
+        val startParameters = gradle.startParameter
+        startParameters.javaClass.getMethod("isConfigurationCache")
+            .invoke(startParameters) as? Boolean
+    } catch (_: Exception) {
+        null
+    } ?: false
+
+internal fun Project.getSystemProperty(key: String): String? {
+    return if (gradle.isConfigurationCacheAvailable) {
+        providers.systemProperty(key).forUseAtConfigurationTime().orNull
+    } else {
+        System.getProperty(key)
+    }
+}