KAPT: allow setting aptMode in the maven plugin

This fixes KT-41129

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/kapt/KaptJVMCompilerMojo.java

@@ -49,6 +49,9 @@ public class KaptJVMCompilerMojo extends K2JVMCompileMojo {
     @Parameter
     private List<DependencyCoordinate> annotationProcessorPaths;
 
+    @Parameter
+    private String aptMode = "stubsAndApt";
+
     @Parameter
     private boolean useLightAnalysis = true;
 
@@ -94,7 +97,7 @@ public class KaptJVMCompilerMojo extends K2JVMCompileMojo {
     ) {
         List<KaptOption> options = new ArrayList<>();
 
-        options.add(new KaptOption("aptMode", "stubsAndApt"));
+        options.add(new KaptOption("aptMode", aptMode));
         options.add(new KaptOption("useLightAnalysis", useLightAnalysis));
         options.add(new KaptOption("correctErrorTypes", correctErrorTypes));
         options.add(new KaptOption("mapDiagnosticLocations", mapDiagnosticLocations));