[release/8.0] Bump version to GA (dotnet#92305)

* [release/8.0] Bump version to RTM

* Add check to properly handle release/rtm naming for workloads

---------

Co-authored-by: Steve Pfister <steve.pfister@microsoft.com>

eng/Versions.props

@@ -9,12 +9,13 @@
     <SdkBandVersion>8.0.100</SdkBandVersion>
     <PackageVersionNet7>7.0.11</PackageVersionNet7>
     <PackageVersionNet6>6.0.$([MSBuild]::Add($([System.Version]::Parse('$(PackageVersionNet7)').Build),11))</PackageVersionNet6>
-    <PreReleaseVersionLabel>rc</PreReleaseVersionLabel>
-    <PreReleaseVersionIteration>2</PreReleaseVersionIteration>
+    <PreReleaseVersionLabel>rtm</PreReleaseVersionLabel>
+    <PreReleaseVersionIteration></PreReleaseVersionIteration>
     <!-- Enable to remove prerelease label. -->
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
-    <WorkloadVersionSuffix Condition="'$(DotNetFinalVersionKind)' != 'release'">-$(PreReleaseVersionLabel).$(PreReleaseVersionIteration)</WorkloadVersionSuffix>
+    <WorkloadVersionSuffix Condition="'$(DotNetFinalVersionKind)' != 'release' and '$(PreReleaseVersionIteration)' == ''">-$(PreReleaseVersionLabel)</WorkloadVersionSuffix>
+    <WorkloadVersionSuffix Condition="'$(WorkloadVersionSuffix)' == '' and '$(DotNetFinalVersionKind)' != 'release'">-$(PreReleaseVersionLabel).$(PreReleaseVersionIteration)</WorkloadVersionSuffix>
     <SdkBandVersionForWorkload_FromRuntimeVersions>$(SdkBandVersion)$(WorkloadVersionSuffix)</SdkBandVersionForWorkload_FromRuntimeVersions>
     <!-- set to false for release branches -->
     <WorkloadsTestPreviousVersions Condition="'$(WorkloadsTestPreviousVersions)' == ''">false</WorkloadsTestPreviousVersions>