Format src/Compiler/CodeGen (#13243)

* adjust settings

* update code

* update code

* update code

* apply formatting

.fantomasignore

@@ -14,7 +14,6 @@ artifacts/
 # Explicitly unformatted implementation files
 
 src/Compiler/Checking/**/*.fs
-src/Compiler/CodeGen/**/*.fs
 src/Compiler/DependencyManager/**/*.fs
 src/Compiler/Facilities/**/*.fs
 src/Compiler/Interactive/**/*.fs
@@ -23,7 +22,6 @@ src/Compiler/Optimize/**/*.fs
 src/Compiler/Service/**/*.fs
 src/Compiler/Symbols/**/*.fs
 src/Compiler/TypedTree/**/*.fs
-src/Microsoft.FSharp.Compiler/**/*.fs
 
 # Explicitly unformatted file that needs more care to get it to format well