Build: use UtilityJavaExec task for compileJs and generateVisitors

compiler/fir/tree/build.gradle.kts

@@ -31,7 +31,7 @@ dependencies {
     generatorClasspath(project("visitors-generator"))
 }
 
-val generateVisitors by tasks.creating(JavaExec::class) {
+val generateVisitors by tasks.creating(UtilityJavaExec::class) {
     val generationRoot = "$projectDir/src/org/jetbrains/kotlin/fir/"
     val output = "$projectDir/visitors"
 

libraries/stdlib/js/build.gradle

@@ -193,7 +193,7 @@ compileTestKotlin2Js {
     }
 }
 
-task compileJs(type: JavaExec) {
+task compileJs(type: UtilityJavaExec) {
     dependsOn compileBuiltinsKotlin2Js, compileKotlin2Js, compileExperimentalKotlin2Js, compileCoroutinesExperimentalKotlin2Js
     inputs.files(compileBuiltinsKotlin2Js.outputs.files)
     inputs.files(compileKotlin2Js.outputs.files)