[Search] Ignore flaky tests (Azure#25927)

* Ignore flaky tests

* Ignore ManualRetryDelayTests.AddsDelay() test

Author: Mohit-Chakraborty

sdk/search/Azure.Search.Documents/tests/Batching/BatchingTests.cs

@@ -337,6 +337,7 @@ public async Task Champion_FineGrainedErrors()
         }
 
         [Test]
+        [Ignore("https://github.com/Azure/azure-sdk-for-net/issues/25444")]
         public async Task Champion_BasicCheckpointing()
         {
             await using SearchResources resources = await SearchResources.CreateWithEmptyIndexAsync<SimpleDocument>(this);
@@ -688,6 +689,7 @@ public async Task Flush_SubmitsEverything()
         }
 
         [Test]
+        [Ignore("https://github.com/Azure/azure-sdk-for-net/issues/25727")]
         public async Task Flush_Blocks()
         {
             await using SearchResources resources = await SearchResources.CreateWithEmptyIndexAsync<SimpleDocument>(this);
@@ -735,6 +737,7 @@ public async Task Dispose_Flushes()
         }
 
         [Test]
+        [Ignore("https://github.com/Azure/azure-sdk-for-net/issues/21515")]
         public async Task Dispose_Blocks()
         {
             await using SearchResources resources = await SearchResources.CreateWithEmptyIndexAsync<SimpleDocument>(this);

sdk/search/Azure.Search.Documents/tests/Batching/ManualRetryDelayTests.cs

@@ -12,6 +12,7 @@ namespace Azure.Search.Documents.Tests
     public class ManualRetryDelayTests
     {
         [Test]
+        [Ignore("https://github.com/Azure/azure-sdk-for-net/issues/23038")]
         public async Task AddsDelay()
         {
             Stopwatch watch = new Stopwatch();