Revert "[release/8.0-preview4] Bump package version for .net 7 to 7.0.6 (#85418)" (#85929)

This reverts commit 8e472c8.

Author: lewing

eng/Versions.props

@@ -7,17 +7,12 @@
     <MinorVersion>0</MinorVersion>
     <PatchVersion>0</PatchVersion>
     <SdkBandVersion>8.0.100</SdkBandVersion>
-    <!-- note: when bumping previous package versions on a release branch, make sure to
-               set $(WorkloadsTestPreviousVersions)=false, so those manifests won't be installed
-               during testing. -->
-    <PackageVersionNet7>7.0.6</PackageVersionNet7>
+    <PackageVersionNet7>7.0.5</PackageVersionNet7>
     <PackageVersionNet6>6.0.$([MSBuild]::Add($([System.Version]::Parse('$(PackageVersionNet7)').Build),11))</PackageVersionNet6>
     <PreReleaseVersionLabel>preview</PreReleaseVersionLabel>
     <PreReleaseVersionIteration>4</PreReleaseVersionIteration>
     <WorkloadVersionSuffix Condition="'$(PreReleaseVersionLabel)' != 'release'">-$(PreReleaseVersionLabel).$(PreReleaseVersionIteration)</WorkloadVersionSuffix>
     <SdkBandVersionForWorkload_FromRuntimeVersions>$(SdkBandVersion)$(WorkloadVersionSuffix)</SdkBandVersionForWorkload_FromRuntimeVersions>
-    <!-- set to false for release branches -->
-    <WorkloadsTestPreviousVersions Condition="'$(WorkloadsTestPreviousVersions)' == ''">false</WorkloadsTestPreviousVersions>
     <!-- Set assembly version to align with major and minor version,
          as for the patches and revisions should be manually updated per assembly if it is serviced. -->
     <AssemblyVersion>$(MajorVersion).$(MinorVersion).0.0</AssemblyVersion>