Prepare in-proc branch for VNext: Clear notes, update version to 4.43.100 (#11205)

* Update version to 4.43.100

* Clear release notes

Author: azfuncgh

src/Directory.Version.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <VersionPrefix>4.$(MinorVersionPrefix)42.100</VersionPrefix>
+    <VersionPrefix>4.$(MinorVersionPrefix)43.100</VersionPrefix>
     <UpdateBuildNumber>true</UpdateBuildNumber>
   </PropertyGroup>
 </Project>