[Az.Reservations] Converted Az.Reservations to generated version (Azure#18888) (Azure#18942)

* Delete src/Reservations directory

* Move Reservations to tmp/Az.AzReservations

* Update Changelog.md

* Update Changelog.md

* Update src/Reservations/Properties/AssemblyInfo.cs

* Update src/Reservations/Az.Reservations.psd1

* Update Get-AzReservationQuote.md

* Update Update-AzReservation.md

* Update Get-AzReservationQuote.md

* Update Update-AzReservation.md

Co-authored-by: azure-powershell-bot <65331932+azure-powershell-bot@users.noreply.github.com>

Author: BethanyZhou

src/Reservations/Az.Reservations.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <PsModuleName>Reservations</PsModuleName>
+  </PropertyGroup>
+
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory).., build.proj))\src\Az.autorest.props" />
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory).., build.proj))\src\Az.Post.props" />
+</Project>