Add Gradle task "testNative"

Support running native tests with "gw testNative" for consistency with "gw test".

DEVELOPMENT.adoc

@@ -28,7 +28,8 @@ jenv enable-plugin export
 [source,shell]
 ----
 gw clean
-gw test
+gw test          # run all tests except native executable tests
+gw testNative    # run native executable tests
 gw spotlessApply # fix code formatting
 gw build         # build everything except native executables
 gw buildNative   # build macOS executable on macOS,

buildSrc/src/main/kotlin/pklNativeBuild.gradle.kts

@@ -1,6 +1,10 @@
 val assembleNative by tasks.registering {}
 
-val checkNative by tasks.registering {}
+val testNative by tasks.registering {}
+
+val checkNative by tasks.registering {
+  dependsOn(testNative)
+}
 
 val buildNative by tasks.registering {
   dependsOn(assembleNative, checkNative)

pkl-core/pkl-core.gradle.kts

@@ -271,7 +271,7 @@ val testAlpineExecutableAmd64 by tasks.registering(Test::class) {
   }
 }
 
-tasks.checkNative {
+tasks.testNative {
   dependsOn(testLinuxExecutableAmd64)
   dependsOn(testLinuxExecutableAarch64)
   dependsOn(testMacExecutableAmd64)