Fix (more) EventHubs flaky batch tests (#7768)

## Summary of changes

Same issue with flaky tests as #7734, I missed more usages of the
function

> The test expectations were incorrect, as ReadEventsFromPartitionAsync
may call ReceiveAsync [several times depending on
timing](https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/eventhub/Azure.Messaging.EventHubs/src/Consumer/EventHubConsumerClient.cs#L520).

Author: pablomartinezbernardo

tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/Azure/AzureEventHubsTests.cs

@@ -101,15 +101,15 @@ public async Task TestEventHubsEnumerableIntegration(string packageVersion, stri
             using (var agent = EnvironmentHelper.GetMockAgent())
             using (await RunSampleAndWaitForExit(agent, packageVersion: packageVersion))
             {
-                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000);
+                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000, assertExpectedCount: false);
 
                 using var s = new AssertionScope();
 
                 var sendSpans = spans.Where(span => span.Name == "azure_eventhubs.send").ToList();
                 var receiveSpans = spans.Where(span => span.Name == "azure_eventhubs.receive").ToList();
 
                 sendSpans.Should().HaveCount(1, "Expected 1 SendAsync span with azure_eventhubs.send operation for enumerable");
-                receiveSpans.Should().HaveCount(1, "Expected 1 receive span");
+                receiveSpans.Should().HaveCountGreaterOrEqualTo(1, "Expected at least 1 receive span");
 
                 var enumerableSendSpans = sendSpans.Where(s => s.Resource == "samples-eventhubs-hub").ToList();
                 enumerableSendSpans.Should().HaveCount(1, "Expected 1 enumerable send span from SendAsync operation");
@@ -174,15 +174,15 @@ public async Task TestEventHubsEnumerableIntegrationWithoutBatchLinks(string pac
             using (var agent = EnvironmentHelper.GetMockAgent())
             using (await RunSampleAndWaitForExit(agent, packageVersion: packageVersion))
             {
-                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000);
+                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000, assertExpectedCount: false);
 
                 using var s = new AssertionScope();
 
                 var sendSpans = spans.Where(span => span.Name == "azure_eventhubs.send").ToList();
                 var receiveSpans = spans.Where(span => span.Name == "azure_eventhubs.receive").ToList();
 
                 sendSpans.Should().HaveCount(1, "Expected 1 SendAsync span for enumerable (no individual event spans when batch links disabled)");
-                receiveSpans.Should().HaveCount(1, "Expected 1 receive span");
+                receiveSpans.Should().HaveCountGreaterOrEqualTo(1, "Expected at least 1 receive span");
 
                 var createSpans = spans.Where(span => span.Name == "azure_eventhubs.create").ToList();
                 createSpans.Should().BeEmpty("Expected no individual message spans (azure_eventhubs.create) when batch links disabled");
@@ -213,7 +213,7 @@ public async Task TestEventHubsBufferedProducerIntegration(string packageVersion
             using (var agent = EnvironmentHelper.GetMockAgent())
             using (await RunSampleAndWaitForExit(agent, packageVersion: packageVersion))
             {
-                var spans = await agent.WaitForSpansAsync(5, timeoutInMilliseconds: 30000);
+                var spans = await agent.WaitForSpansAsync(5, timeoutInMilliseconds: 30000, assertExpectedCount: false);
 
                 using var s = new AssertionScope();
 
@@ -223,7 +223,7 @@ public async Task TestEventHubsBufferedProducerIntegration(string packageVersion
 
                 createSpans.Should().HaveCount(3, "Expected 3 TryAdd spans with azure_eventhubs.create operation");
                 sendSpans.Should().HaveCount(1, "Expected 1 buffered send span with azure_eventhubs.send operation");
-                receiveSpans.Should().HaveCount(1, "Expected 1 receive span");
+                receiveSpans.Should().HaveCountGreaterOrEqualTo(1, "Expected at least 1 receive span");
 
                 var individualMessageSpans = createSpans.Where(s => s.Resource == "samples-eventhubs-hub").ToList();
                 individualMessageSpans.Should().HaveCount(3, "Expected 3 individual message spans from TryAdd operations");
@@ -255,15 +255,15 @@ public async Task TestEventHubsBufferedProducerIntegrationWithoutBatchLinks(stri
             using (var agent = EnvironmentHelper.GetMockAgent())
             using (await RunSampleAndWaitForExit(agent, packageVersion: packageVersion))
             {
-                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000);
+                var spans = await agent.WaitForSpansAsync(2, timeoutInMilliseconds: 30000, assertExpectedCount: false);
 
                 using var s = new AssertionScope();
 
                 var sendSpans = spans.Where(span => span.Name == "azure_eventhubs.send").ToList();
                 var receiveSpans = spans.Where(span => span.Name == "azure_eventhubs.receive").ToList();
 
                 sendSpans.Should().HaveCount(1, "Expected 1 buffered send span (no individual TryAdd spans when batch links disabled)");
-                receiveSpans.Should().HaveCount(1, "Expected 1 receive span");
+                receiveSpans.Should().HaveCountGreaterOrEqualTo(1, "Expected at least 1 receive span");
 
                 var createSpans = spans.Where(span => span.Name == "azure_eventhubs.create").ToList();
                 createSpans.Should().BeEmpty("Expected no individual message spans (azure_eventhubs.create) when batch links disabled");