Check for java 17 launcher

buildSrc/build.gradle.kts

@@ -5,15 +5,23 @@ plugins {
   id("com.diffplug.spotless") version "6.25.0"
 }
 
-if (JavaVersion.current() != JavaVersion.VERSION_17) {
+if (!hasLauncherForJavaVersion(17)) {
   throw GradleException(
-    "JDK 17 is required to build. " +
-      "One option is to download it from https://adoptium.net/. If you believe you already " +
-      "have it, please check that the JAVA_HOME environment variable is pointing at the " +
-      "JDK 17 installation.",
+    "JDK 17 is required to build and gradle was unable to detect it on the system.  " +
+        "Please install it and see https://docs.gradle.org/current/userguide/toolchains.html#sec:auto_detection " +
+        "for details on how gradle detects java toolchains."
   )
 }
 
+fun hasLauncherForJavaVersion(version: Int): Boolean {
+  return try {
+    javaToolchains.launcherFor { languageVersion = JavaLanguageVersion.of(version) }.get()
+    true
+  } catch (e: Exception) {
+    false
+  }
+}
+
 spotless {
   kotlinGradle {
     ktlint().editorConfigOverride(mapOf(