Merged PR 603931: Publish linux runtime v0.0.43

Includes John's recent changes.

cg/nuget/cgmanifest.json

@@ -4056,7 +4056,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "runtime.linux-x64.BuildXL",
-          "Version": "0.0.42"
+          "Version": "0.0.43"
         }
       }
     },

config.dsc

@@ -400,7 +400,7 @@ config({
                 // Runtime dependencies for Linux
                 {
                     id: "runtime.linux-x64.BuildXL",
-                    version: "0.0.42",
+                    version: "0.0.43",
                     osSkip: importFile(f`config.microsoftInternal.dsc`).isMicrosoftInternal
                         ? []
                         : [ "win", "macOS", "unix" ]