[Gradle] Bump max Gradle version in tests to 8.2.1

^KT-58064 In Progress

libraries/tools/kotlin-gradle-plugin-integration-tests/build.gradle.kts

@@ -227,7 +227,7 @@ fun Test.includeTestsWithPattern(include: Boolean, patterns: (MutableSet<String>
 }
 
 fun Test.advanceGradleVersion() {
-    val gradleVersionForTests = "8.1.1"
+    val gradleVersionForTests = "8.2.1"
     systemProperty("kotlin.gradle.version.for.tests", gradleVersionForTests)
 }