Add support for multi-value query parameters

Signed-off-by: Daeho Kwon <trewq231@naver.com>

Author: kwondh5217

core/src/main/java/com/linecorp/armeria/internal/server/annotation/AnnotatedValueResolver.java

@@ -613,12 +613,16 @@ private static AnnotatedValueResolver ofQueryParamMap(String name,
                                                         rawValueType == Collection.class ||
                                                         rawValueType == Set.class)) {
             throw new IllegalArgumentException(
-                    "Invalid Map value type: " + rawValueType);
+                    "Invalid Map value type: " + rawValueType
+                    + " (expected Iterable, List, Collection or Set)");
         }
 
         final BiFunction<AnnotatedValueResolver, ResolverContext, Object> biFunction;
 
-        if (List.class.isAssignableFrom(rawValueType)) {
+        if (List.class.isAssignableFrom(rawValueType) ||
+            Collection.class.isAssignableFrom(rawValueType) ||
+            Iterable.class.isAssignableFrom(rawValueType)
+        ) {
             biFunction = (resolver, ctx) -> ctx.queryParams().stream()
                                                .collect(toImmutableMap(
                                                        Entry::getKey,