Revert "Update to latest .Net SDK 7.0 (#1760)" (#1763)

This reverts commit 71cda5bbdc.

azure-pipelines/createBuildDirectories.sh

@@ -13,7 +13,7 @@
 
 # The script need to run from the repo root
 
-net7projectArray=(
+net6projectArray=(
     "./src/Microsoft.InsightsGenerator"
     "./src/Microsoft.Kusto.ServiceLayer"
     "./src/Microsoft.SqlTools.Credentials"
@@ -40,7 +40,7 @@ netStandard2ProjectArray=(
 )
 
 # Please update the framework vars when updating target framework for the projects
-framework7="/bin/Debug/net7.0/"
+framework6="/bin/Debug/net6.0/"
 framework2="/bin/Debug/netstandard2.1/"
 
 requiredLocDirectories=(
@@ -75,13 +75,13 @@ requiredLocDirectories=(
     "zh-hant"
 )
 
-for i in "${net7projectArray[@]}"
+for i in "${net6projectArray[@]}"
 do
    : 
    for k in "${requiredLocDirectories[@]}"
     do
         : 
-        output=`mkdir -v -p $i$framework7$k`
+        output=`mkdir -v -p $i$framework6$k`
         echo $output
     done
 done