KT-10028 Support parallel builds in maven

Mark mojo's as thread safe as users confirmed that all related errors
seem to be fixed

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

@@ -75,7 +75,7 @@ import java.util.List;
  *     mojo.getLog().info("kotlin build script accessing build info of ${mojo.project.artifactId} project")
  * </code></pre>
  */
-@Mojo(name = "script", requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = false)
+@Mojo(name = "script", requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = true)
 public class ExecuteKotlinScriptMojo extends AbstractMojo {
     /**
      * The Kotlin script file to be executed.

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java

@@ -47,7 +47,7 @@ import java.util.concurrent.locks.ReentrantLock;
  *
  * @noinspection UnusedDeclaration
  */
-@Mojo(name = "js", defaultPhase = LifecyclePhase.COMPILE, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = false)
+@Mojo(name = "js", defaultPhase = LifecyclePhase.COMPILE, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = true)
 public class K2JSCompilerMojo extends KotlinCompileMojoBase<K2JSCompilerArguments> {
 
     private static final String OUTPUT_DIRECTORIES_COLLECTOR_PROPERTY_NAME = "outputDirectoriesCollector";

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JVMCompileMojo.java

@@ -40,7 +40,7 @@ import static org.jetbrains.kotlin.maven.Util.filterClassPath;
  *
  * @noinspection UnusedDeclaration
  */
-@Mojo(name = "compile", defaultPhase = LifecyclePhase.COMPILE, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = false)
+@Mojo(name = "compile", defaultPhase = LifecyclePhase.COMPILE, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = true)
 public class K2JVMCompileMojo extends KotlinCompileMojoBase<K2JVMCompilerArguments> {
     /**
      * Project classpath.

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

@@ -42,7 +42,7 @@ import java.util.List;
 @Mojo(name = "test-compile",
         defaultPhase = LifecyclePhase.TEST_COMPILE,
         requiresDependencyResolution = ResolutionScope.TEST,
-        threadSafe = false
+        threadSafe = true
 )
 public class KotlinTestCompileMojo extends K2JVMCompileMojo {
     /**

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

@@ -18,7 +18,7 @@ import java.util.List;
 import static com.intellij.openapi.util.text.StringUtil.join;
 import static org.jetbrains.kotlin.maven.Util.filterClassPath;
 
-@Mojo(name = "metadata", defaultPhase = LifecyclePhase.PROCESS_SOURCES, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = false)
+@Mojo(name = "metadata", defaultPhase = LifecyclePhase.PROCESS_SOURCES, requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = true)
 public class MetadataMojo extends KotlinCompileMojoBase<K2MetadataCompilerArguments> {
     @Parameter(defaultValue = "${project.compileClasspathElements}", required = true, readonly = true)
     public List<String> classpath;

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

@@ -13,7 +13,7 @@ import java.io.File;
 import java.util.List;
 
 @Mojo(name = "test-metadata", defaultPhase = LifecyclePhase.PROCESS_TEST_SOURCES, requiresDependencyResolution = ResolutionScope.TEST,
-        threadSafe = false
+        threadSafe = true
 )
 public class TestMetadataMojo extends MetadataMojo {
     @Parameter(property = "maven.test.skip", defaultValue = "false")