Revert "[Gradle][Tests][MPP] Move BETA-versions test logic in MPPBaseTest"

This reverts commit 5beba0acc6.

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/MPPBaseTest.kt

@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.gradle.testbase
-
-/** Beta versions of Gradle and AGP are checking in multiplatform related tests.
- *  Bumped manually.
- */
-const val BETA_GRADLE = TestVersions.Gradle.G_8_0
-const val BETA_AGP = TestVersions.AGP.AGP_80
-
-/**
- * Base class for all Multiplatform Gradle plugin Kotlin integration tests.
- */
-@AndroidTestVersions(additionalVersions = [BETA_AGP])
-@GradleTestVersions(maxVersion = BETA_GRADLE, additionalVersions = [TestVersions.Gradle.MAX_SUPPORTED])
-abstract class MPPBaseTest : KGPBaseTest() {
-}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/TestVersions.kt

@@ -26,6 +26,7 @@ interface TestVersions {
         const val MIN_SUPPORTED = minSupportedGradleVersion
         const val MIN_SUPPORTED_KPM = G_7_0
         const val MAX_SUPPORTED = G_7_6
+        const val NEXT_RELEASE = G_8_0
     }
 
     object Kotlin {
@@ -47,6 +48,7 @@ interface TestVersions {
 
         const val MIN_SUPPORTED = AGP_42 // KotlinAndroidPlugin.minimalSupportedAgpVersion
         const val MAX_SUPPORTED = AGP_74 // Update once Gradle MAX_SUPPORTED version will be bumped
+        const val NEXT_RELEASE = AGP_80
     }
 
     enum class AgpCompatibilityMatrix(