Add Azure.Monitor.OpenTelemetry.LiveMetrics with auto-generated classes (Azure#39602)

* Add auto-generated classes for live metrics swagger.

* fix readme and changelog location

* Fix CI yaml

Author: rajkumar-rangaraj

sdk/monitor/Azure.Monitor.OpenTelemetry.LiveMetrics/CHANGELOG.md

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+# Release History
+
+## 1.0.0-beta.1 (Unreleased)

sdk/monitor/Azure.Monitor.OpenTelemetry.LiveMetrics/README.md

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+# Azure Monitor Live Metrics client library for .NET
+
+TODO
+
+## Getting started
+
+### Install the package
+
+
+### Prerequisites
+
+
+### Authenticate the client
+
+
+## Key concepts
+
+TODO
+
+## Examples
+
+TODO
+
+## Troubleshooting
+
+TODO
+
+## Next steps
+
+TODO
+
+## Contributing
+
+TODO

sdk/monitor/Azure.Monitor.OpenTelemetry.LiveMetrics/src/Azure.Monitor.OpenTelemetry.LiveMetrics.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Description>An OpenTelemetry .NET AzureMonitor OpenTelemetry Live Metrics</Description>
+    <AssemblyTitle>AzureMonitor OpenTelemetry Live Metrics</AssemblyTitle>
+    <Version>1.0.0-beta.1</Version>
+    <PackageTags>Azure Monitor OpenTelemetry live Metrics ApplicationInsights</PackageTags>
+    <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
+    <IncludeOperationsSharedSource>true</IncludeOperationsSharedSource>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Azure.Core" />
+  </ItemGroup>
+
+</Project>