Fix native tests in CircleCI (#514)

Fix an issue where the CI job attempts to install the wrong executable
when on macOS/aarch64.

Also, adjusts native test definitions in pkl-server to match pkl-core.

pkl-server/pkl-server.gradle.kts

@@ -24,15 +24,62 @@ tasks.test {
   exclude("**/NativeServerTest.*")
 }
 
-val nativeTest by tasks.registering(Test::class) {
-  dependsOn(":pkl-cli:assembleNative")
+private fun Test.configureNativeTest() {
   testClassesDirs = files(tasks.test.get().testClassesDirs)
   classpath = tasks.test.get().classpath
   include("**/NativeServerTest.*")
 }
 
-val testNative by tasks.existing
-testNative {
-  dependsOn(nativeTest)
+val testMacExecutableAarch64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:macExecutableAarch64")
+  configureNativeTest()
 }
 
+val testMacExecutableAmd64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:macExecutableAmd64")
+  configureNativeTest()
+}
+
+val testLinuxExecutableAmd64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:linuxExecutableAmd64")
+  configureNativeTest()
+}
+
+val testLinuxExecutableAarch64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:linuxExecutableAarch64")
+  configureNativeTest()
+}
+
+val testAlpineExecutableAmd64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:alpineExecutableAmd64")
+  configureNativeTest()
+}
+
+val testWindowsExecutableAmd64 by tasks.registering(Test::class) {
+  dependsOn(":pkl-cli:windowsExecutableAmd64")
+  configureNativeTest()
+}
+
+val testNative by tasks.existing
+testNative {
+  when {
+    buildInfo.os.isMacOsX -> {
+      dependsOn(testMacExecutableAmd64)
+      if (buildInfo.arch == "aarch64") {
+        dependsOn(testMacExecutableAarch64)
+      }
+    }
+    buildInfo.os.isWindows -> {
+      dependsOn(testWindowsExecutableAmd64)
+    }
+    buildInfo.os.isLinux && buildInfo.arch == "aarch64" -> {
+      dependsOn(testLinuxExecutableAarch64)
+    }
+    buildInfo.os.isLinux && buildInfo.arch == "amd64" -> {
+      dependsOn(testLinuxExecutableAmd64)
+      if (buildInfo.hasMuslToolchain) {
+        dependsOn(testAlpineExecutableAmd64)
+      }
+    }
+  }
+}