Upgrade to kotlin 2 (#2054)

### 📝 Description

- Upgrade kotlin to 2.0
- Remove unused file
[FieldValueInfosExtensions.kt](https://github.com/ExpediaGroup/graphql-kotlin/compare/master...daniel-humla:graphql-kotlin-kotlin-2:upgrade-to-kotlin-2?expand=1#diff-83598ed0250eac913ae661abe96bcc47c344e342f09f8168341c7728d1c5b2ef)
- Added minimal additional test
[MetadataCapturingDataFetcherFactoryProviderTest.kt](https://github.com/ExpediaGroup/graphql-kotlin/compare/master...daniel-humla:graphql-kotlin-kotlin-2:upgrade-to-kotlin-2?expand=1#diff-8a648bcb4be11526cc310472dbca7a5a26ff15b7a8e5c15668d5f9e19debb18e)
to maintain code coverage

### 🔗 Related Issues
#2037

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ graphql-java = "22.1"
 graalvm = "0.10.2"
 jackson = "2.17.1"
 # kotlin version has to match the compile-testing compiler version
-kotlin = "1.9.24"
+kotlin = "2.0.0"
 kotlinx-benchmark = "0.4.11"
 kotlinx-coroutines = "1.8.1"
 # TODO kotlin 1.9 upgrade: fix GraphQLTestUtils and GenerateKotlinxClientIT
@@ -29,7 +29,7 @@ spring-boot = "3.2.7"
 commons-codec = { strictly = "[1.13, 2[", prefer = "1.16.0" }
 
 # test dependencies
-compile-testing = "0.5.0"
+compile-testing = "0.5.1"
 icu = "75.1"
 junit = "5.10.2"
 logback = "1.5.6"

plugins/server/graphql-kotlin-graalvm-metadata-generator/src/main/kotlin/com/expediagroup/graphql/plugin/graalvm/MetadataCapturingDataFetcherFactoryProvider.kt

@@ -32,7 +32,6 @@ internal class MetadataCapturingDataFetcherFactoryProvider(val scanResult: ScanR
     // we need to capture enums
     private val additionalTypes: MutableSet<String> = HashSet()
 
-    @OptIn(ExperimentalStdlibApi::class)
     override fun functionDataFetcherFactory(target: Any?, kClass: KClass<*>, kFunction: KFunction<*>): DataFetcherFactory<Any?> {
         val methodName = kFunction.javaMethod!!.name
         val classMetadata = reflectMetadataMap.getOrPut(kClass.java.name) { MutableClassMetadata(name = kClass.java.name, methods = ArrayList()) }

plugins/server/graphql-kotlin-graalvm-metadata-generator/src/test/kotlin/MetadataCapturingDataFetcherFactoryProviderTest.kt

@@ -0,0 +1,33 @@
+import com.expediagroup.graphql.plugin.graalvm.MetadataCapturingDataFetcherFactoryProvider
+import com.expediagroup.graphql.plugin.graalvm.enums.EnumQuery
+import io.github.classgraph.ClassGraph
+import io.github.classgraph.ScanResult
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import kotlin.reflect.KFunction
+
+class MetadataCapturingDataFetcherFactoryProviderTest {
+
+    private lateinit var scanResult: ScanResult
+    private lateinit var provider: MetadataCapturingDataFetcherFactoryProvider
+
+    @BeforeEach
+    fun setup() {
+        scanResult = ClassGraph().enableAllInfo().acceptPackages("com.expediagroup.graphql.plugin.graalvm").scan()
+        provider = MetadataCapturingDataFetcherFactoryProvider(scanResult, listOf("com.expediagroup.graphql.plugin.graalvm"))
+
+        val kClass = EnumQuery::class
+        val kFunction = kClass.members.find { it.name == "enumArgQuery" } as KFunction<*>
+        provider.functionDataFetcherFactory(null, kClass, kFunction)
+    }
+
+    @Test
+    fun `reflectMetadata should not be empty`() {
+        val metadata = provider.reflectMetadata()
+
+        Assertions.assertNotNull(metadata)
+        Assertions.assertTrue(metadata.isNotEmpty(), "Reflect metadata should not be empty")
+        Assertions.assertEquals(listOf("com.expediagroup.graphql.plugin.graalvm"), provider.supportedPackages)
+    }
+}