[Internal] Open Telemetry : Fixes preview pipeline test for open tele…

…metry (#5005)

## Description

As part of this PR, fixing test pipeline.

**Root Cause:** Metrics generation tests were designed to validate only
metrics functionality with dimensions. However, with distributed tracing
enabled by default in the preview package, the test began asserting
traces generated by the distributed tracing feature.
**Resolution:** Disabled the distributed tracing feature in tests to
ensure compatibility.

## Type of change

- [] Bug fix (non-breaking change which fixes an issue)

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/Metrics/OpenTelemetryMetricsTest.cs

@@ -95,6 +95,7 @@ public async Task MetricsGenerationTest(string stabilityMode, ConnectionMode con
             {
                 await base.TestInit((builder) => builder.WithClientTelemetryOptions(new CosmosClientTelemetryOptions()
                 {
+                    DisableDistributedTracing = true,
                     IsClientMetricsEnabled = true
                 })
                 .WithConnectionModeDirect());
@@ -104,6 +105,7 @@ await base.TestInit((builder) => builder.WithClientTelemetryOptions(new CosmosCl
             {
                 await base.TestInit((builder) => builder.WithClientTelemetryOptions(new CosmosClientTelemetryOptions()
                 {
+                    DisableDistributedTracing = true,
                     IsClientMetricsEnabled = true
                 })
                 .WithConnectionModeGateway());
@@ -167,6 +169,7 @@ public async Task MetricsWithOptionalDimensionTest(bool? shouldIncludeOptionalDi
 
             await base.TestInit((builder) => builder.WithClientTelemetryOptions(new CosmosClientTelemetryOptions()
             {
+                DisableDistributedTracing = true,
                 IsClientMetricsEnabled = true,
                 OperationMetricsOptions = new OperationMetricsOptions()
                 {