Move deprecated kotlin-runtime and reduced runtime for tests into stdlib

Rename mock-runtime-for-test project to kotlin-stdlib:jvm-minimal-for-test

prepare/mock-runtime-for-test/build.gradle.kts

@@ -1,56 +0,0 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
-description = "Kotlin Mock Runtime for Tests"
-
-apply { plugin("kotlin") }
-
-jvmTarget = "1.6"
-javaHome = rootProject.extra["JDK_16"] as String
-
-dependencies {
-    compile(projectDist(":kotlin-stdlib"))
-}
-
-sourceSets {
-    "main" {
-        java.apply {
-            srcDir(File(buildDir, "src"))
-        }
-    }
-    "test" {}
-}
-
-val copySources by task<Copy> {
-    from(project(":kotlin-stdlib").projectDir.resolve("jvm/runtime"))
-            .include("kotlin/TypeAliases.kt",
-                    "kotlin/text/TypeAliases.kt")
-    from(project(":kotlin-stdlib").projectDir.resolve("src"))
-            .include("kotlin/collections/TypeAliases.kt",
-                    "kotlin/jvm/JvmVersion.kt",
-                    "kotlin/util/Standard.kt",
-                    "kotlin/internal/Annotations.kt",
-                    "kotlin/internal/contracts/ContractBuilder.kt",
-                    "kotlin/internal/contracts/Effect.kt")
-    into(File(buildDir, "src"))
-}
-
-tasks.withType<JavaCompile> {
-    sourceCompatibility = "1.6"
-    targetCompatibility = "1.6"
-}
-
-tasks.withType<KotlinCompile> {
-    dependsOn(copySources)
-    kotlinOptions {
-        freeCompilerArgs += listOf("-module-name", "kotlin-stdlib")
-    }
-}
-
-val jar = runtimeJar {
-    dependsOn(":core:builtins:serialize")
-    from(fileTree("${rootProject.extra["distDir"]}/builtins")) { include("kotlin/**") }
-}
-
-val distDir: String by rootProject.extra
-
-dist(targetName = "kotlin-mock-runtime-for-test.jar", targetDir = File(distDir))