Fix Painless method lookup over unknown super interfaces (elastic#97062)

In Java 21 List now extends SequencedCollection, instead of Collection
directly. When resolving methods Painless starts at the defined type,
and iterates up through super classes and interfaces. Unfortunately if a
superinterface was not known, as it is for SequencedCollection since it
is not in the allowed list of classes, method resolution would give up.
This commit adjusts the superinterface interation to continue traversing
until the method is found or no more superinterfaces are found.

fixes elastic#97022

Author: rjernst

docs/changelog/97062.yaml

@@ -0,0 +1,6 @@
+pr: 97062
+summary: Fix Painless method lookup over unknown super interfaces
+area: Infra/Scripting
+type: bug
+issues:
+ - 97022

gradle.properties

@@ -12,7 +12,7 @@ systemProp.jdk.tls.client.protocols=TLSv1.2
 
 # java homes resolved by environment variables
 org.gradle.java.installations.auto-detect=false
-org.gradle.java.installations.fromEnv=JAVA_TOOLCHAIN_HOME,JAVA_HOME,RUNTIME_JAVA_HOME,JAVA20_HOME,JAVA19_HOME,JAVA18_HOME,JAVA17_HOME,JAVA16_HOME,JAVA15_HOME,JAVA14_HOME,JAVA13_HOME,JAVA12_HOME,JAVA11_HOME,JAVA8_HOME
+org.gradle.java.installations.fromEnv=JAVA_TOOLCHAIN_HOME,JAVA_HOME,RUNTIME_JAVA_HOME,JAVA21_HOME,JAVA20_HOME,JAVA19_HOME,JAVA18_HOME,JAVA17_HOME,JAVA16_HOME,JAVA15_HOME,JAVA14_HOME,JAVA13_HOME,JAVA12_HOME,JAVA11_HOME,JAVA8_HOME
 
 # log some dependency verification info to console
 org.gradle.dependency.verification.console=verbose

modules/lang-painless/src/main/java/org/elasticsearch/painless/lookup/PainlessLookup.java

@@ -360,9 +360,8 @@ private <T> T lookupPainlessObject(Class<?> originalTargetClass, Function<Painle
                         if (painlessObject != null) {
                             return painlessObject;
                         }
-
-                        targetInterfaces.addAll(Arrays.asList(targetInterface.getInterfaces()));
                     }
+                    targetInterfaces.addAll(Arrays.asList(targetInterface.getInterfaces()));
                 }
             }