Group iosArm64 with tier 1 targets

See: https://kotlinlang.org/docs/whatsnew21.html#iosarm64-promoted-to-tier-1

Author: michaelbull

buildSrc/src/main/kotlin/kotlin-conventions.gradle.kts

@@ -28,6 +28,7 @@ kotlin {
     macosArm64()
     iosSimulatorArm64()
     iosX64()
+    iosArm64()
 
     /* https://kotlinlang.org/docs/native-target-support.html#tier-2 */
 
@@ -43,8 +44,6 @@ kotlin {
     tvosX64()
     tvosArm64()
 
-    iosArm64()
-
     /* https://kotlinlang.org/docs/native-target-support.html#tier-3 */
 
     androidNativeArm32()