Drop java 11, bump GraalVM to 23.0 (#439)

* Remove unnecessary strictfp modifier
* Add annotations to address Truffle DSL warnings (@Idempotent, @Exclusive)
* Adjust build logic to allow building cross-arch on macOS
* Add warning suppression for specialization limit (left this one as a TODO)

buildSrc/build.gradle.kts

@@ -18,15 +18,15 @@ dependencies {
 }
 
 java {
-  sourceCompatibility = JavaVersion.VERSION_11
-  targetCompatibility = JavaVersion.VERSION_11
+  sourceCompatibility = JavaVersion.VERSION_17
+  targetCompatibility = JavaVersion.VERSION_17
 }
 
 kotlin {
   target {
     compilations.configureEach {
       kotlinOptions {
-        jvmTarget = "11"
+        jvmTarget = "17"
       }
     }
   }