Fixes the unit tests for enabling point-in-time on AOS Serverless which was added in #6050. (#6136)

Signed-off-by: David Venable <dlv@amazon.com>

Author: dlvenable

data-prepper-plugins/opensearch/src/test/java/org/opensearch/dataprepper/plugins/source/opensearch/worker/client/SearchAccessStrategyTest.java

@@ -227,8 +227,8 @@ void serverless_flag_true_defaults_to_search_context_type_none() {
     }
 
     @ParameterizedTest
-    @ValueSource(strings = {"POINT_IN_TIME", "SCROLL"})
-    void serverless_flag_true_throws_InvalidPluginConfiguration_if_search_context_type_is_point_in_time_or_scroll(final String searchContextType) {
+    @ValueSource(strings = {"SCROLL"})
+    void serverless_flag_true_throws_InvalidPluginConfiguration_if_search_context_type_scroll(final String searchContextType) {
 
         final AwsAuthenticationConfiguration awsAuthenticationConfiguration = mock(AwsAuthenticationConfiguration.class);
         when(awsAuthenticationConfiguration.isServerlessCollection()).thenReturn(true);