[TEST] Wait for no pending operations on the index shard (#118244)

This fixes testRetryPointInTime which on teardown is looking to assert that the operations in the translog and in the lucene index are the same. Previously we didn't wait for the translog operations to be applied. This changes `assertConsistentHistoryInLuceneIndex` to wait for the pending operations in the translog to be applied. Fixes #117116

Author: andreidan

muted-tests.yml

@@ -157,9 +157,6 @@ tests:
 - class: org.elasticsearch.xpack.test.rest.XPackRestIT
  method: test {p0=snapshot/10_basic/Create a source only snapshot and then restore it}
  issue: https://github.com/elastic/elasticsearch/issues/117295
-- class: org.elasticsearch.xpack.searchablesnapshots.RetrySearchIntegTests
- method: testRetryPointInTime
- issue: https://github.com/elastic/elasticsearch/issues/117116
 - class: org.elasticsearch.xpack.inference.DefaultEndPointsIT
  method: testInferDeploysDefaultElser
  issue: https://github.com/elastic/elasticsearch/issues/114913

test/framework/src/main/java/org/elasticsearch/snapshots/AbstractSnapshotIntegTestCase.java

@@ -128,6 +128,7 @@ protected Collection<Class<? extends Plugin>> nodePlugins() {
 
  @After
  public void assertConsistentHistoryInLuceneIndex() throws Exception {
+ internalCluster().beforeIndexDeletion();
  internalCluster().assertConsistentHistoryBetweenTranslogAndLuceneIndex();
  }