[AzureMonitorExporter] fix unmapped attributes from being dropped from telemetry (Azure#45909)

* remove unused attributes.

* update tests

* changelog

* fix live test

* revert change

* cleanup tests

* cleanup tests

Author: Timothy Mothra

sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/tests/Azure.Monitor.OpenTelemetry.AspNetCore.Integration.Tests/DistroWebAppLiveTests.cs

@@ -275,6 +275,7 @@ await QueryAndVerifyDependency(
                     Properties = new List<KeyValuePair<string, string>>
                     {
                         new("_MS.ProcessedByMetricExtractors", "(Name: X,Ver:'1.1')"),
+                        new("network.protocol.version", "1.1"),
                         new("CustomProperty1", "Value1"),
                     },
                 });
@@ -301,6 +302,7 @@ await QueryAndVerifyRequest(
                     Properties = new List<KeyValuePair<string, string>>
                     {
                         new("_MS.ProcessedByMetricExtractors", "(Name: X,Ver:'1.1')"),
+                        new("network.protocol.version", "1.1"),
                         new("CustomProperty1", "Value1"),
                     },
                 });