Move Elastic to main (#15951)

* Move Elastic to main

* Adding SignatureIssues.csv

Co-authored-by: azure-powershell-bot <[email protected]>
Co-authored-by: wyunchi-ms <[email protected]>

Author: wyunchi-ms

src/Elastic/Az.Elastic.csproj

@@ -0,0 +1,7 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <PsModuleName>Elastic</PsModuleName>
+  </PropertyGroup>
+
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory).., build.proj))\src\Az.autorest.props" />
+</Project>