fix(appsec): capture all FileChannel.open args to avoid CSI generator partial-arg path

beforeOpenSet previously captured only 2 of 3 arguments, triggering the
partial-argument code path in AdviceGeneratorImpl which calls Stream.sorted()
without a comparator on ArgumentSpecification (not Comparable). Adding the
unused FileAttribute[] third parameter makes the capture complete and
sequential, so isPositionalArguments() returns false and the sorted() path
is never entered.

Author: jandro996

dd-java-agent/instrumentation/java/java-io-1.8/src/main/java/datadog/trace/instrumentation/java/lang/FileChannelCallSite.java

@@ -5,6 +5,7 @@
 import java.nio.file.OpenOption;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
+import java.nio.file.attribute.FileAttribute;
 import java.util.Set;
 import javax.annotation.Nullable;
 
@@ -31,7 +32,8 @@ public static void beforeOpenArray(
       "java.nio.channels.FileChannel java.nio.channels.FileChannel.open(java.nio.file.Path, java.util.Set, java.nio.file.attribute.FileAttribute[])")
   public static void beforeOpenSet(
       @CallSite.Argument(0) @Nullable final Path path,
-      @CallSite.Argument(1) @Nullable final Set<? extends OpenOption> options) {
+      @CallSite.Argument(1) @Nullable final Set<? extends OpenOption> options,
+      @CallSite.Argument(2) @Nullable final FileAttribute<?>[] attrs) {
     if (path != null) {
       String pathStr = path.toString();
       FileIORaspHelper.INSTANCE.beforeFileLoaded(pathStr);