Exclude some .wxl files from localization (dotnet#43226)

* Exclude some .wxl files from localization
- preparing for dotnet/arcade#10383 merge and migration to this repo
- without this, `OneLocBuild` will generate multiple unused translation files

* !fixup! Correct JSON syntax

Author: dougbu

eng/Localize/LocExclusions.json

@@ -0,0 +1,7 @@
+{
+  "Exclusions": [
+    "src\\Installers\\Windows\\AspNetCoreModule-Setup\\setupstrings.wxl",
+    "src\\Installers\\Windows\\SharedFramework\\Strings.wxl",
+    "src\\Installers\\Windows\\TargetingPack\\Strings.wxl"
+  ]
+}