fix: iast-agent was not using configureCompiler

Author: bric3

dd-java-agent/agent-iast/build.gradle

@@ -11,17 +11,8 @@ plugins {
 apply from: "$rootDir/gradle/java.gradle"
 apply from: "$rootDir/gradle/version.gradle"
 
-java {
-  toolchain {
-    languageVersion.set(JavaLanguageVersion.of(11))
-  }
-  sourceCompatibility = JavaVersion.VERSION_1_8
-  targetCompatibility = JavaVersion.VERSION_1_8
-}
-
 tasks.withType(AbstractCompile).configureEach {
-  // ensure no APIs beyond JDK8 are used
-  options.release = 8
+  configureCompiler(it, 11, JavaVersion.VERSION_1_8, "Ensure no APIs beyond JDK8 are used")
 }
 
 // First version with Mac M1 support