Exclude caffeine jandex.idx from bundle (#6447)

The bundle transitively includes caffeine-2.9.3 via the
aws-s3-accessgrants-java-plugin dependency.

Per ben-manes/caffeine#628 caffeine itself
does not use Jandex (and removed it in the next version 3.0.0).

Author: dagnir

.changes/next-release/bugfix-AWSSDKforJavav2Bundle-c542e9a.json

@@ -0,0 +1,6 @@
+{
+    "type": "bugfix",
+    "category": "AWS SDK for Java v2 Bundle",
+    "contributor": "",
+    "description": "Remove unused `META-INF/jandex.idx`. This file was shaded into the `bundle` JAR from a transitive dependency of the bundle, which also does not use this file."
+}

bundle-sdk/pom.xml

@@ -188,6 +188,14 @@
                                 <include>software.amazon.eventstream:eventstream</include>
                             </includes>
                         </artifactSet>
+                        <filters>
+                            <filter>
+                                <artifact>com.github.ben-manes.caffeine:caffeine</artifact>
+                                <excludes>
+                                    <exclude>META-INF/jandex.idx</exclude>
+                                </excludes>
+                            </filter>
+                        </filters>
                         <relocations>
                             <relocation>
                                 <pattern>org.apache</pattern>